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From Michael Blow <mblow.apa...@gmail.com>
Subject Re: External function dependency problem
Date Tue, 05 Jul 2016 05:33:49 GMT
Thanks for trying it out, I will debug with your test case and figure out
what is going on.

Thanks,

-MDB
On Tue, Jul 5, 2016 at 1:31 AM Xikui Wang <xikuiw@uci.edu> wrote:

> I checked out this patch. Unfortunately it generates similar error as the
> quick fix that suggested by Raman before. The error log is attached.
>
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> at
>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> at
>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:78)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:55)
> at
>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:41)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> ... 8 more
> Caused by: java.lang.ClassCastException:
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> org.apache.asterix.external.api.IFunctionFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> ... 12 more
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> at
>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> at
>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:78)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:55)
> at
>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:41)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> ... 8 more
> Caused by: java.lang.ClassCastException:
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> org.apache.asterix.external.api.IFunctionFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> ... 12 more
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:130)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> ... 4 more
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> at
>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> at
>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> ... 5 more
> Caused by:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:78)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:55)
> at
>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:41)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> ... 8 more
> Caused by: java.lang.ClassCastException:
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> org.apache.asterix.external.api.IFunctionFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> ... 12 more
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:130)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> ... 4 more
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> at
>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> at
>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> ... 5 more
> Caused by:
> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
>  Unable to load/instantiate class
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:78)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:55)
> at
>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:41)
> at
>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> at
>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> ... 8 more
> Caused by: java.lang.ClassCastException:
> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> org.apache.asterix.external.api.IFunctionFactory
> at
>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> ... 12 more
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> ... 4 more
> Caused by: java.lang.InterruptedException
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> ... 6 more
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> ... 4 more
> Caused by: java.lang.InterruptedException
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> ... 6 more
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> ... 4 more
> Caused by: java.lang.InterruptedException
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> ... 6 more
> org.apache.hyracks.api.exceptions.HyracksDataException:
> org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> java.lang.InterruptedException
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> ... 4 more
> Caused by: java.lang.InterruptedException
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at
>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> ... 6 more
> testFile
>
> src/test/resources/runtimets/queries/external-library/tweetGeoTag/tweetGeoTag.3.update.aql
> raised an exception:
> java.lang.Exception: HTTP operation failed: 2
> STATUS LINE: HTTP/1.1 500 Server Error
> SUMMARY: Error: Failure in feed
>
> On Mon, Jul 4, 2016 at 8:26 PM, Till Westmann <tillw@apache.org> wrote:
>
> > The change looks good to me and I’ve +2’ed it. However, I haven’t
> > tested it myself. It would be good if Xikui could test it (either
> > before of after merging to master) and if we could add a test case
> > that tests the intended behavior.
> >
> > Cheers,
> > Till
> >
> > On 4 Jul 2016, at 0:36, Michael Blow wrote:
> >
> > I've submitted a patchset to Gerrit with a proposed fix for this:
> >>
> >> https://asterix-gerrit.ics.uci.edu/#/c/973/
> >>
> >> Thanks,
> >>
> >> -MDB
> >> On Mon, Jul 4, 2016 at 2:37 AM Till Westmann <tillw@apache.org> wrote:
> >>
> >> Sounds good to me!
> >>>
> >>> Cheers,
> >>> Till
> >>>
> >>> On 3 Jul 2016, at 23:34, Michael Blow wrote:
> >>>
> >>> I think a better solution might be to invert the normal class loader
> >>>> resolution order with an extension of URLClassLoader that overrides
> >>>> loadClass(), which tries resolving classes internally before
> >>>> delegating to
> >>>> the parent. Boot classpath classes can still be forced to load
> >>>> correctly. I
> >>>> think this will solve the use case without the regression due to
> >>>> inability
> >>>> to resolve *db classes.
> >>>>
> >>>> Thanks,
> >>>>
> >>>> -MDB
> >>>>
> >>>> On Sat, Jul 2, 2016 at 11:44 PM Xikui Wang <xikuiw@uci.edu> wrote:
> >>>>
> >>>> The error log is as follow:
> >>>>>
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:53)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> >>>
> >>>> ... 8 more
> >>>>> Caused by: java.lang.ClassCastException:
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> >>>>> org.apache.asterix.external.api.IFunctionFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:72)
> >>>
> >>>> ... 12 more
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:53)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> >>>
> >>>> ... 8 more
> >>>>> Caused by: java.lang.ClassCastException:
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> >>>>> org.apache.asterix.external.api.IFunctionFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:72)
> >>>
> >>>> ... 12 more
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:130)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> >>>>> ... 4 more
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> >>>
> >>>> ... 5 more
> >>>>> Caused by:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:53)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> >>>
> >>>> ... 8 more
> >>>>> Caused by: java.lang.ClassCastException:
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> >>>>> org.apache.asterix.external.api.IFunctionFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:72)
> >>>
> >>>> ... 12 more
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:130)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:341)
> >>>>> ... 4 more
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:111)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.meta.AlgebricksMetaOperatorDescriptor$2.open(AlgebricksMetaOperatorDescriptor.java:143)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.feed.dataflow.SyncFeedRuntimeInputHandler.open(SyncFeedRuntimeInputHandler.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.operators.FeedMetaComputeNodePushable.open(FeedMetaComputeNodePushable.java:127)
> >>>
> >>>> ... 5 more
> >>>>> Caused by:
> >>>>> org.apache.hyracks.algebricks.common.exceptions.AlgebricksException:
> >>>>>  Unable to load/instantiate class
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:75)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunction.<init>(ExternalFunctionProvider.java:53)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunctionProvider.getExternalFunctionEvaluator(ExternalFunctionProvider.java:39)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalScalarFunctionEvaluatorFactory.createScalarEvaluator(ExternalScalarFunctionEvaluatorFactory.java:41)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.algebricks.runtime.operators.std.AssignRuntimeFactory$1.open(AssignRuntimeFactory.java:109)
> >>>
> >>>> ... 8 more
> >>>>> Caused by: java.lang.ClassCastException:
> >>>>> edu.uci.ics.cloudberry.noah.feed.GeoTagFactory cannot be cast to
> >>>>> org.apache.asterix.external.api.IFunctionFactory
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.<init>(ExternalFunction.java:72)
> >>>
> >>>> ... 12 more
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> >>>>> ... 4 more
> >>>>> Caused by: java.lang.InterruptedException
> >>>>> at java.lang.Object.wait(Native Method)
> >>>>> at java.lang.Object.wait(Object.java:502)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> >>>
> >>>> ... 6 more
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> >>>>> ... 4 more
> >>>>> Caused by: java.lang.InterruptedException
> >>>>> at java.lang.Object.wait(Native Method)
> >>>>> at java.lang.Object.wait(Object.java:502)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> >>>
> >>>> ... 6 more
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> >>>>> ... 4 more
> >>>>> Caused by: java.lang.InterruptedException
> >>>>> at java.lang.Object.wait(Native Method)
> >>>>> at java.lang.Object.wait(Object.java:502)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> >>>
> >>>> ... 6 more
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:365)
> >>>>> at org.apache.hyracks.control.nc.Task.run(Task.java:297)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException:
> >>>>> java.lang.InterruptedException
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:126)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicFrameReader.nextFrame(NonDeterministicFrameReader.java:43)
> >>>
> >>>> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:344)
> >>>>> ... 4 more
> >>>>> Caused by: java.lang.InterruptedException
> >>>>> at java.lang.Object.wait(Native Method)
> >>>>> at java.lang.Object.wait(Object.java:502)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.hyracks.dataflow.std.collectors.NonDeterministicChannelReader.findNextSender(NonDeterministicChannelReader.java:124)
> >>>
> >>>> ... 6 more
> >>>>> testFile
> >>>>>
> >>>>>
> >>>>>
> >>>
> src/test/resources/runtimets/queries/external-library/tweetGeoTag/tweetGeoTag.3.update.aql
> >>>
> >>>> raised an exception:
> >>>>> java.lang.Exception: HTTP operation failed: 2
> >>>>> STATUS LINE: HTTP/1.1 500 Server Error
> >>>>> SUMMARY: Error: Failure in feed
> >>>>>
> >>>>> STACKTRACE: org.apache.asterix.common.exceptions.AsterixException:
> >>>>> Failure
> >>>>> in feed
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.feed.management.FeedLifecycleEventSubscriber.assertNoFailure(FeedLifecycleEventSubscriber.java:62)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.external.feed.management.FeedLifecycleEventSubscriber.assertEvent(FeedLifecycleEventSubscriber.java:55)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.aql.translator.QueryTranslator.handleConnectFeedStatement(QueryTranslator.java:2238)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.aql.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:366)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.aql.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:253)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.api.http.servlet.RESTAPIServlet.handleRequest(RESTAPIServlet.java:195)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.api.http.servlet.UpdateAPIServlet.handleRequest(UpdateAPIServlet.java:30)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.api.http.servlet.RESTAPIServlet.doPost(RESTAPIServlet.java:162)
> >>>
> >>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
> >>>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> >>>>> at
> >>>>>
> org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:546)
> >>>>> at
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:483)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:228)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:956)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:411)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:188)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:891)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:114)
> >>>
> >>>> at org.eclipse.jetty.server.Server.handle(Server.java:353)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:598)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:1076)
> >>>
> >>>> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:805)
> >>>>> at
> >>>>> org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
> >>>>> at
> >>>>>
> org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:427)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:510)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.io.nio.SelectChannelEndPoint.access$000(SelectChannelEndPoint.java:34)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:450)
> >>>
> >>>> at java.lang.Thread.run(Thread.java:745)
> >>>>>
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.test.aql.TestExecutor.executeHttpMethod(TestExecutor.java:275)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.test.aql.TestExecutor.executeUpdate(TestExecutor.java:331)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.test.aql.TestExecutor.executeTest(TestExecutor.java:496)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.test.aql.TestExecutor.executeTest(TestExecutor.java:762)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>
> org.apache.asterix.test.runtime.ExecutionTest.test(ExecutionTest.java:106)
> >>>
> >>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> >>>
> >>>> at java.lang.reflect.Method.invoke(Method.java:497)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> >>>
> >>>> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> >>>
> >>>> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> >>>>> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> >>>>> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> >>>>> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> >>>>> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> >>>>> at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> >>>>> at org.junit.runners.Suite.runChild(Suite.java:127)
> >>>>> at org.junit.runners.Suite.runChild(Suite.java:26)
> >>>>> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> >>>>> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> >>>>> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> >>>>> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> >>>>> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> >>>
> >>>> at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> >>>>> at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
> >>>
> >>>> at
> >>>>>
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
> >>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >>>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> >>>
> >>>> at
> >>>>>
> >>>>>
> >>>>>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> >>>
> >>>> at java.lang.reflect.Method.invoke(Method.java:497)
> >>>>> at
> >>>>> com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
> >>>>> ...Unexpected!
> >>>>>
> >>>>> On Sat, Jul 2, 2016 at 7:23 PM, Raman Grover
> >>>>> <ramangrover29@gmail.com>
> >>>>> wrote:
> >>>>>
> >>>>> i am missing the attachment
> >>>>>> On Jul 2, 2016 6:39 PM, "Xikui Wang" <xikuiw@uci.edu> wrote:
> >>>>>>
> >>>>>> Hi Raman,
> >>>>>>>
> >>>>>>> Thanks for your help. I tried this quick fix on my branch, but it
> >>>>>>> introduces some new exceptions. I think this causes Asterix fails
> >>>>>>> at
> >>>>>>> entering the external function. The error message is attached.
> >>>>>>>
> >>>>>>> Best,
> >>>>>>> Xikui
> >>>>>>>
> >>>>>>> On Fri, Jul 1, 2016 at 10:11 AM, Raman Grover
> >>>>>>> <ramangrover29@gmail.com
> >>>>>>>
> >>>>>>
> >>>>>> wrote:
> >>>>>>>
> >>>>>>> Operations related to setting up an external library are contained
> >>>>>>>> in
> >>>>>>>> ExternalLibraryUtil
> >>>>>>>> <
> >>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> https://github.com/apache/asterixdb/blob/master/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/external/ExternalLibraryUtils.java
> >>>
> >>>>
> >>>>>>>>>
> >>>>>>>> At line 382, we have
> >>>>>>>> // create and return the class loader
> >>>>>>>>
> >>>>>>>> ClassLoader classLoader = new URLClassLoader(urls,
> >>>>>>>> parentClassLoader);
> >>>>>>>> return classLoader;
> >>>>>>>>
> >>>>>>>> Above, we have the parentClassLoader set to the classloader for
> >>>>>>>> ExternalLibraryUtil which is the application class loader
> >>>>>>>> (AsterixDB's
> >>>>>>>> classloader that loads the dependencies from pom.xml). The
> >>>>>>>> proposed
> >>>>>>>> solution (a) in earlier thread - skipping application classloader
> >>>>>>>>
> >>>>>>> would
> >>>>>
> >>>>>> translate to replacing the above code with
> >>>>>>>>
> >>>>>>>> ClassLoader classLoader = new URLClassLoader(urls, null);
> >>>>>>>>
> >>>>>>>> Regards,
> >>>>>>>> Raman
> >>>>>>>>
> >>>>>>>> On Thu, Jun 30, 2016 at 4:41 PM, Xikui Wang <xikuiw@uci.edu>
> >>>>>>>> wrote:
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>>> Hi Abdullah,
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> I reverted my code to reproduce the problem. Noticing this
> >>>>>>>>> external
> >>>>>>>>> function has a couple of other bugs but the dependency one is
> >>>>>>>>>
> >>>>>>>> blocking
> >>>>>
> >>>>>> others, so this should be enough to reproduce the problem.
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>> The external function package is geoTag.zip.
> >>>>>>>>>
> >>>>>>>>> ​
> >>>>>>>>>>
> >>>>>>>>>> ​Test scripts are in tweetGeoTag.zip
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> External function is loading data from data/, i.e.:
> >>>>>>>>> data/state.json
> >>>>>>>>>
> >>>>>>>> .
> >>>>>
> >>>>>> So
> >>>>>>
> >>>>>>> all json files in data.zip need to be placed under
> >>>>>>>>> ../asterixdb/asterix-app/data/
> >>>>>>>>>
> >>>>>>>>> The real_tweets_adm.adm used in ddl is also attached.
> >>>>>>>>>
> >>>>>>>>> This setting will cause
> >>>>>>>>>
> >>>>>>>>> java.lang.NoSuchMethodError:
> >>>>>>>>>
> >>>>>>>>>>
> com.fasterxml.jackson.core.JsonFactory.requiresPropertyOrdering()Z
> >>>>>>>>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>
> com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:541)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>
> com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:452)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>
> org.wololo.geojson.GeoJSONFactory.<clinit>(GeoJSONFactory.java:17)
> >>>>>>
> >>>>>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> edu.uci.ics.cloudberry.gnosis.USGeoJSONIndex.loadShape(IGeoIndex.scala:29)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> edu.uci.ics.cloudberry.gnosis.USGeoGnosis$.loadShape(USGeoGnosis.scala:101)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> edu.uci.ics.cloudberry.gnosis.USGeoGnosis$$anonfun$load$1.apply(USGeoGnosis.scala:20)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> edu.uci.ics.cloudberry.gnosis.USGeoGnosis$$anonfun$load$1.apply(USGeoGnosis.scala:18)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
> >>>
> >>>> at scala.collection.immutable.List.foreach(List.scala:381)
> >>>>>>>>>> at
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> scala.collection.TraversableLike$class.map(TraversableLike.scala:245)
> >>>>>>>>
> >>>>>>>>> at scala.collection.immutable.List.map(List.scala:285)
> >>>>>>>>>> at
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> edu.uci.ics.cloudberry.gnosis.USGeoGnosis.load(USGeoGnosis.scala:18)
> >>>>>>>>
> >>>>>>>>> at
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>> edu.uci.ics.cloudberry.gnosis.USGeoGnosis.<init>(USGeoGnosis.scala:15)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> edu.uci.ics.cloudberry.noah.feed.GeoTagFunction.initialize(GeoTagFunction.java:34)
> >>>
> >>>> at
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> org.apache.asterix.external.library.ExternalFunction.initialize(ExternalFunction.java:113)
> >>>
> >>>>
> >>>>>>>>>>
> >>>>>>>>> The attachments exceed the size limits. I moved them under this
> >>>>>>>>>
> >>>>>>>> google
> >>>>>
> >>>>>> drive directory:
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>
> https://drive.google.com/folderview?id=0B_6Dzy3OTjaNRUVJWTRvWEtKSU0&usp=sharing
> >>>
> >>>>
> >>>>>>>>> Let me know if you need anything else. Thanks.
> >>>>>>>>>
> >>>>>>>>> Best,
> >>>>>>>>> Xikui
> >>>>>>>>>
> >>>>>>>>> On Thu, Jun 30, 2016 at 12:06 PM, abdullah alamoudi <
> >>>>>>>>>
> >>>>>>>> bamousaa@gmail.com
> >>>>>>
> >>>>>>>
> >>>>>>>>> wrote:
> >>>>>>>>>
> >>>>>>>>> I will look into that.
> >>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> @Xikui,
> >>>>>>>>>>> Do you have a reproducable use case where such a behavior can
> >>>>>>>>>>> be
> >>>>>>>>>>>
> >>>>>>>>>> observed?
> >>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>> Cheers,
> >>>>>>>>>>> Abdullah.
> >>>>>>>>>>>
> >>>>>>>>>>> On Thu, Jun 30, 2016 at 7:53 PM, Raman Grover <
> >>>>>>>>>>>
> >>>>>>>>>> ramangrover29@gmail.com>
> >>>>>>>>
> >>>>>>>>> wrote:
> >>>>>>>>>>>
> >>>>>>>>>>> Hi
> >>>>>>>>>>>>
> >>>>>>>>>>>> Each external library has an separately associated custom
> >>>>>>>>>>>> class
> >>>>>>>>>>>>
> >>>>>>>>>>> loader
> >>>>>>>>
> >>>>>>>>> (URLClassLoader) that loads the contained functions and any
> >>>>>>>>>>>>
> >>>>>>>>>>> dependencies
> >>>>>>>>>
> >>>>>>>>>> (jar files) packaged inside the library. The custom loader
> >>>>>>>>>>>> fits
> >>>>>>>>>>>>
> >>>>>>>>>>> into
> >>>>>>>>
> >>>>>>>>> the
> >>>>>>>>>
> >>>>>>>>>> natural hierarchy with system (classpath based) classloader as
> >>>>>>>>>>>>
> >>>>>>>>>>> the
> >>>>>>
> >>>>>>> immediate parent and bootstrap classloader as the root. As the
> >>>>>>>>>>>>
> >>>>>>>>>>> delegation
> >>>>>>>>>>>
> >>>>>>>>>>>> model works, a class loader attempts to load a class only
> >>>>>>>>>>>> after
> >>>>>>>>>>>>
> >>>>>>>>>>> parent(s)
> >>>>>>>>>>>
> >>>>>>>>>>>> in the lineage have failed.
> >>>>>>>>>>>>
> >>>>>>>>>>>> In your specific case, the system class loader is able to find
> >>>>>>>>>>>>
> >>>>>>>>>>> the
> >>>>>>
> >>>>>>> jackson
> >>>>>>>>>>>
> >>>>>>>>>>>> library from the configured classpath and so the library
> >>>>>>>>>>>>
> >>>>>>>>>>> classloader
> >>>>>>>>
> >>>>>>>>> is
> >>>>>>>>>
> >>>>>>>>>> not
> >>>>>>>>>>>
> >>>>>>>>>>>> involved at all for this jar. The problem arising due to
> >>>>>>>>>>>>
> >>>>>>>>>>> different
> >>>>>>
> >>>>>>> versions
> >>>>>>>>>>>
> >>>>>>>>>>>> of a jar present across the hierarchy of classloaders is
> >>>>>>>>>>>>
> >>>>>>>>>>> similar
> >>>>>
> >>>>>> to
> >>>>>>
> >>>>>>> one
> >>>>>>>>>
> >>>>>>>>>> faced in web containers such as Tomcat or application servers
> >>>>>>>>>>>>
> >>>>>>>>>>> such
> >>>>>>
> >>>>>>> as
> >>>>>>>>
> >>>>>>>>> Websphere where system loaded classes can override any
> >>>>>>>>>>>>
> >>>>>>>>>>> application
> >>>>>>
> >>>>>>> specific
> >>>>>>>>>>>
> >>>>>>>>>>>> classes due to name conflict.
> >>>>>>>>>>>>
> >>>>>>>>>>>> The way you are defining a library is correct. The fix needs
> >>>>>>>>>>>> to
> >>>>>>>>>>>>
> >>>>>>>>>>> be
> >>>>>>
> >>>>>>> in
> >>>>>>>>
> >>>>>>>>> the
> >>>>>>>>>>>
> >>>>>>>>>>>> way the classes are loaded by AsterixDB (here acting as an
> >>>>>>>>>>>>
> >>>>>>>>>>> application
> >>>>>>>>
> >>>>>>>>> server).
> >>>>>>>>>>>>
> >>>>>>>>>>>> I see two ways:-
> >>>>>>>>>>>>
> >>>>>>>>>>>> a) Skipping the system class loader: AsterixDB uses a
> >>>>>>>>>>>>
> >>>>>>>>>>> URLClassloader
> >>>>>>>>
> >>>>>>>>> to
> >>>>>>>>>
> >>>>>>>>>> load libraries. Setting the  parent of the this classloader as
> >>>>>>>>>>>>
> >>>>>>>>>>> null
> >>>>>>
> >>>>>>> implies
> >>>>>>>>>>>
> >>>>>>>>>>>> the bootrstrap classloader (root) as the immediate parent. The
> >>>>>>>>>>>>
> >>>>>>>>>>> bootstrap
> >>>>>>>>>
> >>>>>>>>>> classloader loads rt.jar (java runtime classes) and i18n.jar
> >>>>>>>>>>>>
> >>>>>>>>>>> and
> >>>>>
> >>>>>> these
> >>>>>>>>
> >>>>>>>>> definitely do not have conflicts with your library
> >>>>>>>>>>>> dependencies
> >>>>>>>>>>>>
> >>>>>>>>>>> (if
> >>>>>>
> >>>>>>> they
> >>>>>>>>>
> >>>>>>>>>> do, not sure why one would override the classes in rt.jar and
> >>>>>>>>>>>>
> >>>>>>>>>>> so
> >>>>>
> >>>>>> we
> >>>>>>
> >>>>>>> need to
> >>>>>>>>>>>
> >>>>>>>>>>>> fix the library). Note that the system classloader is out of
> >>>>>>>>>>>>
> >>>>>>>>>>> the
> >>>>>
> >>>>>> hierarchy
> >>>>>>>>>>>
> >>>>>>>>>>>> here and so any other jars loaded by AsterixDB from its
> >>>>>>>>>>>>
> >>>>>>>>>>> classpath
> >>>>>
> >>>>>> (pom.xml)
> >>>>>>>>>>>
> >>>>>>>>>>>> would not be visible.
> >>>>>>>>>>>>
> >>>>>>>>>>>> b) Defining a Custom Class loader: Inside AsterixDB, we
> >>>>>>>>>>>>
> >>>>>>>>>>> provide a
> >>>>>
> >>>>>> custom
> >>>>>>>>>
> >>>>>>>>>> implementation of classloader that attempts to load a class
> >>>>>>>>>>>>
> >>>>>>>>>>> prior
> >>>>>
> >>>>>> to
> >>>>>>>>
> >>>>>>>>> delegating to the parent. This way, the library classes and
> >>>>>>>>>>>>
> >>>>>>>>>>> packaged
> >>>>>>>>
> >>>>>>>>> dependencies override any system level classes from the class
> >>>>>>>>>>>>
> >>>>>>>>>>> path
> >>>>>>
> >>>>>>> and
> >>>>>>>>
> >>>>>>>>> even
> >>>>>>>>>>>
> >>>>>>>>>>>> the classes contained in rt.jar and i18n.jar.
> >>>>>>>>>>>>
> >>>>>>>>>>>> I am opening the discussion here to suggest further
> >>>>>>>>>>>>
> >>>>>>>>>>> alternatives
> >>>>>
> >>>>>> or
> >>>>>>
> >>>>>>> provide
> >>>>>>>>>>>
> >>>>>>>>>>>> preferences.
> >>>>>>>>>>>>
> >>>>>>>>>>>> I have a preference for (a)  (skipping the system class
> >>>>>>>>>>>> loader)
> >>>>>>>>>>>>
> >>>>>>>>>>> for
> >>>>>>
> >>>>>>> two
> >>>>>>>>>
> >>>>>>>>>> reasons:
> >>>>>>>>>>>>
> >>>>>>>>>>>> a) it is simpler
> >>>>>>>>>>>>
> >>>>>>>>>>>> b) the other option allows a custom class loader to override
> >>>>>>>>>>>>
> >>>>>>>>>>> classes
> >>>>>>>>
> >>>>>>>>> in
> >>>>>>>>>
> >>>>>>>>>> rt.jar., which is ok but not how classloaders are supposed to
> >>>>>>>>>>>>
> >>>>>>>>>>> work
> >>>>>>
> >>>>>>> in
> >>>>>>>>
> >>>>>>>>> principle.
> >>>>>>>>>>>>
> >>>>>>>>>>>> Regards,
> >>>>>>>>>>>>
> >>>>>>>>>>>> Raman
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>> On Jun 29, 2016 11:07 PM, "Mike Carey" <dtabass@gmail.com>
> >>>>>>>>>>>>
> >>>>>>>>>>> wrote:
> >>>>>>
> >>>>>>>
> >>>>>>>>>>>> Any classloader experts have suggestions...?
> >>>>>>>>>>>>> On Jun 29, 2016 10:26 PM, "Xikui Wang" <xikuiw@uci.edu>
> >>>>>>>>>>>>>
> >>>>>>>>>>>> wrote:
> >>>>>
> >>>>>>
> >>>>>>>>>>>>> Hi Devs,
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>> We found a problem when trying to build external functions
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>> for
> >>>>>>
> >>>>>>> the
> >>>>>>>>
> >>>>>>>>> cloudberry demo.
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>> When the external function is depend on certain library,
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>> the
> >>>>>
> >>>>>> library
> >>>>>>>>>
> >>>>>>>>>> that
> >>>>>>>>>>>>
> >>>>>>>>>>>>> comes with the external function will be blocked by same
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>> library
> >>>>>>>>
> >>>>>>>>> in
> >>>>>>>>>
> >>>>>>>>>> AsterixDB. In our case, our external function 'geoTag' uses
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>> jackson
> >>>>>>>>
> >>>>>>>>
>

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