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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HBASE-10078) Dynamic Filter - Not using DynamicClassLoader when using FilterList
Date Fri, 03 Jan 2014 00:56:51 GMT

     [ https://issues.apache.org/jira/browse/HBASE-10078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jimmy Xiang reopened HBASE-10078:
---------------------------------


My bad. There is no wire compatibility issue in 0.94 actually.  Let me post a patch soon.

Trunk/0.96 doesn't have this problem.

> Dynamic Filter - Not using DynamicClassLoader when using FilterList
> -------------------------------------------------------------------
>
>                 Key: HBASE-10078
>                 URL: https://issues.apache.org/jira/browse/HBASE-10078
>             Project: HBase
>          Issue Type: Bug
>          Components: Filters
>    Affects Versions: 0.94.13
>            Reporter: Federico Gaule
>            Assignee: Jimmy Xiang
>            Priority: Minor
>
> I've tried to use dynamic jar load (https://issues.apache.org/jira/browse/HBASE-1936)
but seems to have an issue with FilterList. 
> Here is some log from my app where i send a Get with a FilterList containing AFilter
and other with BFilter.
> {noformat}
> 2013-12-02 13:55:42,564 DEBUG org.apache.hadoop.hbase.util.DynamicClassLoader: Class
d.p.AFilter not found - using dynamical class loader
> 2013-12-02 13:55:42,564 DEBUG org.apache.hadoop.hbase.util.DynamicClassLoader: Finding
class: d.p.AFilter
> 2013-12-02 13:55:42,564 DEBUG org.apache.hadoop.hbase.util.DynamicClassLoader: Loading
new jar files, if any
> 2013-12-02 13:55:42,677 DEBUG org.apache.hadoop.hbase.util.DynamicClassLoader: Finding
class again: d.p.AFilter
> 2013-12-02 13:55:43,004 ERROR org.apache.hadoop.hbase.io.HbaseObjectWritable: Can't find
class d.p.BFilter
> java.lang.ClassNotFoundException: d.p.BFilter
> 	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> 	at java.lang.Class.forName0(Native Method)
> 	at java.lang.Class.forName(Class.java:247)
> 	at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:820)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.getClassByName(HbaseObjectWritable.java:792)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:679)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:594)
> 	at org.apache.hadoop.hbase.filter.FilterList.readFields(FilterList.java:324)
> 	at org.apache.hadoop.hbase.client.Get.readFields(Get.java:405)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:690)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:594)
> 	at org.apache.hadoop.hbase.client.Action.readFields(Action.java:101)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:690)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:594)
> 	at org.apache.hadoop.hbase.client.MultiAction.readFields(MultiAction.java:116)
> 	at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:690)
> 	at org.apache.hadoop.hbase.ipc.Invocation.readFields(Invocation.java:126)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Connection.processData(HBaseServer.java:1311)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Connection.readAndProcess(HBaseServer.java:1226)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Listener.doRead(HBaseServer.java:748)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.doRunLoop(HBaseServer.java:539)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.java:514)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> {noformat}
> AFilter is not found so it tries with DynamicClassLoader, but when it tries to load AFilter,
it uses URLClassLoader and fails without checking out for dynamic jars.
> I think the issue is releated to FilterList#readFields
> {code:title=FilterList.java|borderStyle=solid} 
>  public void readFields(final DataInput in) throws IOException {
>     byte opByte = in.readByte();
>     operator = Operator.values()[opByte];
>     int size = in.readInt();
>     if (size > 0) {
>       filters = new ArrayList<Filter>(size);
>       for (int i = 0; i < size; i++) {
>         Filter filter = (Filter)HbaseObjectWritable.readObject(in, conf);
>         filters.add(filter);
>       }
>     }
>   }
> {code}
> HbaseObjectWritable#readObject uses a conf (created by calling HBaseConfiguration.create())
which i suppose doesn't include a DynamicClassLoader instance.



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