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From Justin Yan <justin....@remitly.com>
Subject Re: Flink 1.2 Proper Packaging of flink-table with SBT
Date Wed, 08 Mar 2017 17:10:31 GMT
Hi Timo,

Regarding the dependency issue, looking at flink-table's pom.xml, I believe
the issue is the dependency on flink-streaming-scala, which then
transitively depends on almost all of the core flink modules.  If it had
not been for the aforementioned JIRA issue about OOM errors, I probably
would've just declared my dependency in SBT like this and been done with it:

"org.apache.flink" %% "flink-table" % "1.2.0" exclude("org.apache.flink",

As for the missing Janino artifacts, I agree it is strange as the
dependency is declared - and the JAR contained the calcite dependencies.  I
basically followed the standard "build from source" steps (as documented
and copied the flink-table JAR that was in the target/ directory.  If there
is trouble reproducing, I'm happy to provide a more detailed set-up.



On Wed, Mar 8, 2017 at 1:53 AM, Timo Walther <twalthr@apache.org> wrote:

> Hi Justin,
> thank you for reporting your issues. I never tried the Table API with SBT
> but `flink-table` should not declare dependencies to core modules, this is
> only done in `test` scope, maybe you have to specify the right scope
> manually? You are right, the mentioned Jira should be fixed asap, I added
> it to my personal TODO list. Regarding the missing Janino artifacts in the
> Jar file, I created a Jira issue (https://issues.apache.org/
> jira/browse/FLINK-5994). This is very strange as it actually a dependency
> of flink-table.
> Thanks again for the feedback. If you experience any further issues with
> the Table API feel free to post them here.
> Regards,
> Timo
> Am 08/03/17 um 04:50 schrieb Justin Yan:
> Of course, 15 minutes after I give up and decide to email the mailing
> list, I figure it out - my flink App was using the CollectionsEnvironment
> and not the proper RemoteEnvironment.
> It is still the case, however, that the `flink-table` JAR built by the
> standard commands doesn't include the dependencies it requires, and so I'd
> be curious to hear what the proper procedure is for linking against
> `flink-table` if you want to avoid the bug I highlighted in the
> aforementioned JIRA.
> Thank you and sorry for the extra noise!
> Justin
> On Tue, Mar 7, 2017 at 7:21 PM, Justin Yan <justin.yan@remitly.com> wrote:
>> Hello!
>> We are attempting to use the Flink Table API, but are running into a few
>> issues.
>> We initially started with our dependencies looking something like this:
>> libraryDependencies ++= Seq(  "org.apache.flink" %% "flink-scala" % "1.2.0" % "provided",
 "org.apache.flink" %% "flink-clients" % "1.2.0" % "provided",  "org.apache.flink" %% "flink-table"
% "1.2.0",  Libraries.specs2,  ...)
>> However, this is mildly annoying since flink-table declares dependencies
>> on the flink core modules, and thus brings everything in *anyway*.  On
>> top of that, we saw this JIRA: https://issues.apache.or
>> g/jira/browse/FLINK-5227, which we found concerning, so we decided to
>> follow the advice - we downloaded and built Flink-1.2 from source (java 7,
>> mvn 3.3) using the following (We're also using the Kinesis connector):
>> tools/change-scala-version.sh 2.11mvn clean install -Pinclude-kinesis -DskipTestscd
flink-distmvn clean install -Pinclude-kinesis -DskipTests
>> Once this was done, we took the JAR in "/flink-libraries/flink-table/target/"
>> and copied it over to the taskManager "/lib" directory.  Finally, we marked
>> our `flink-table` dependency as "provided".  Everything compiles, but when
>> I try to actually run a simple job, I get the following error at runtime:
>> java.lang.NoClassDefFoundError: org/codehaus/commons/compiler/
>> CompileException
>> Indeed, when I peek inside of the `flink-table` JAR, I can't find that
>> particular package (and similarly, it isn't in the flink-dist JAR either)
>> $ jar tf flink-table_2.11-1.2.0.jar | grep codehaus
>> $
>> I then attempted to include this library in my user code by adding:
>> "org.codehaus.janino" % "janino" % "3.0.6",
>> to my list of dependencies.  When I run a `jar tf myjar.jar | grep
>> CompileException` - I see the class. However, when I run my flink
>> application in this fat JAR, I *continue to get the same error*, even
>> though I am positive this class is included in the fat JAR.  I eventually
>> got around this by placing this jar in the `flink/lib` directory, but I am
>> very confused as to how this class cannot be found when I have included it
>> in the fat JAR that I am submitting with the Flink CLI to a YARN cluster.
>> I mostly wanted to mention this in case it is a bug, but mostly to see if
>> anyone else has had trouble with the Table API, and if not, if I have
>> structured my project incorrectly to cause these troubles.
>> Thanks!
>> Justin

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