[HIVE-24108] AddToClassPathAction should use TezClassLoader

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0-alpha-1
• Assignee: László Bodor
• Reporter: László Bodor
• Created: 02/Sep/20 07:21
• Updated: 17/Nov/22 08:48
• Resolved: 28/Oct/20 21:13

Description

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.

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

Issue Links

• blocks: HIVE-23930 Upgrade to tez 0.10.0
• is related to: TEZ-4228 TezClassLoader should be used in TezChild and for Configuration objects