[jira] [Created] (TAJO-1830) Fix race condition in HdfsServiceTracker

["Jinho Kim (JIRA)" <ji...@apache.org>]

Jinho Kim created TAJO-1830:
-------------------------------

             Summary: Fix race condition in HdfsServiceTracker
                 Key: TAJO-1830
                 URL: https://issues.apache.org/jira/browse/TAJO-1830
             Project: Tajo
          Issue Type: Bug
          Components: TajoMaster, Unit Test
    Affects Versions: 0.10.0
            Reporter: Jinho Kim
            Assignee: Jinho Kim
             Fix For: 0.11.0, 0.12.0


If HdfsServiceTracker reads active-master file before the file not closed, active-master file is empty.

{format}
testAutoFailOver(org.apache.tajo.ha.TestHAServiceHDFSImpl)  Time elapsed: 4.668 sec  <<< ERROR!
org.apache.tajo.exception.TajoRuntimeException: org.apache.tajo.client.v2.exception.ClientConnectionException: java.io.EOFException
	at org.apache.tajo.client.SessionConnection.getTajoMasterConnection(SessionConnection.java:141)
	at org.apache.tajo.client.SessionConnection.<init>(SessionConnection.java:113)
	at org.apache.tajo.client.TajoClientImpl.<init>(TajoClientImpl.java:62)
	at org.apache.tajo.client.TajoClientImpl.<init>(TajoClientImpl.java:86)
	at org.apache.tajo.client.TajoClientImpl.<init>(TajoClientImpl.java:82)
	at org.apache.tajo.ha.TestHAServiceHDFSImpl.verifyDataBaseAndTable(TestHAServiceHDFSImpl.java:152)
	at org.apache.tajo.ha.TestHAServiceHDFSImpl.testAutoFailOver(TestHAServiceHDFSImpl.java:82)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	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$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
Caused by: org.apache.tajo.client.v2.exception.ClientConnectionException: java.io.EOFException
	... 30 more
Caused by: org.apache.tajo.service.ServiceTrackerException: java.io.EOFException
	at org.apache.tajo.ha.HdfsServiceTracker.getAddressElements(HdfsServiceTracker.java:508)
	at org.apache.tajo.ha.HdfsServiceTracker.getClientServiceAddress(HdfsServiceTracker.java:409)
	at org.apache.tajo.client.SessionConnection.getTajoMasterAddr(SessionConnection.java:361)
	at org.apache.tajo.client.SessionConnection.getTajoMasterConnection(SessionConnection.java:130)
	... 29 more
Caused by: java.io.EOFException
	at java.io.DataInputStream.readUnsignedShort(DataInputStream.java:340)
	at java.io.DataInputStream.readUTF(DataInputStream.java:589)
	at java.io.DataInputStream.readUTF(DataInputStream.java:564)
	at org.apache.tajo.ha.HdfsServiceTracker.getAddressElements(HdfsServiceTracker.java:498)
	... 32 more
	at org.apache.tajo.ha.HdfsServiceTracker.createMasterFile(HdfsServiceTracker.java:249)
	at org.apache.tajo.ha.HdfsServiceTracker.register(HdfsServiceTracker.java:155)
	at org.apache.tajo.ha.HdfsServiceTracker$PingChecker.run(HdfsServiceTracker.java:374)
	at java.lang.Thread.run(Thread.java:745)
{format}



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