[jira] [Commented] (HIVE-24108) LlapDaemon should use TezClassLoader

["László Bodor (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-24108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17216366#comment-17216366 ] 

László Bodor commented on HIVE-24108:
-------------------------------------

Tez 0.10.0 upgrade (HIVE-23930) is ready to be committed, could you please take a look at this one [~harishjp]? this was tested in HIVE-23930 precommit

> LlapDaemon should use TezClassLoader
> ------------------------------------
>
>                 Key: HIVE-24108
>                 URL: https://issues.apache.org/jira/browse/HIVE-24108
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: László Bodor
>            Assignee: László Bodor
>            Priority: Major
>         Attachments: HIVE-24108.01.patch, hive_log_llap.log
>
>
> TEZ-4228 fixes an issue from tez side, which is about to use TezClassLoader instead of the system classloader. However, there are some codepaths, e.g. in  [^hive_log_llap.log]  which shows that the system class loader is used. As thread context classloaders are inherited, the easier solution is to early-initialize TezClassLoader in LlapDaemon, and let all threads use that as context class loader, so this solution is more like TEZ-4223 for llap daemons.
> {code}
> 2020-09-02T00:18:20,242 ERROR [TezTR-93696_1_1_1_0_0] tez.TezProcessor: java.lang.RuntimeException: Map operator initialization failed
> 	at org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:351)
> 	at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:266)
> 	at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:250)
> 	at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:381)
> 	at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:75)
> 	at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:62)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:422)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1682)
> 	at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:62)
> 	at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:38)
> 	at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> 	at org.apache.hadoop.hive.llap.daemon.impl.StatsRecordingThreadPool$WrappedCallable.call(StatsRecordingThreadPool.java:118)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> 	at java.lang.Thread.run(Thread.java:748)
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.hive.serde2.TestSerDe
> 	at org.apache.hadoop.hive.ql.exec.MapOperator.getConvertedOI(MapOperator.java:332)
> 	at org.apache.hadoop.hive.ql.exec.MapOperator.setChildren(MapOperator.java:427)
> 	at org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:288)
> 	... 16 more
> Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.hive.serde2.TestSerDe
> 	at org.apache.hadoop.hive.ql.plan.TableDesc.getDeserializerClass(TableDesc.java:79)
> 	at org.apache.hadoop.hive.ql.plan.TableDesc.getDeserializer(TableDesc.java:100)
> 	at org.apache.hadoop.hive.ql.plan.TableDesc.getDeserializer(TableDesc.java:95)
> 	at org.apache.hadoop.hive.ql.exec.MapOperator.getConvertedOI(MapOperator.java:313)
> 	... 18 more
> Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hive.serde2.TestSerDe
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> 	at java.lang.Class.forName0(Native Method)
> 	at java.lang.Class.forName(Class.java:348)
> 	at org.apache.hadoop.hive.ql.plan.TableDesc.getDeserializerClass(TableDesc.java:76)
> 	... 21 more
> {code}



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