TAJO-874: Sometimes InvalidOperationException occurs when aggregates TableStat.

[babokim]

It is difficult to reproduce. So I added exception handling logic and type name in InvalidOperationException.

[hyunsik]

I'm facing the following errors from both 'maven clean install' and Junit test execution in IntelliJ. Could you check it?

2014-06-24 16:56:51,377 INFO: org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit (logAuditMessage(7409)) - allowed=true  ugi=hyunsik (auth:SIMPLE)   ip=/127.0.0.1   cmd=getfileinfo src=/tajo/warehouse/table14 dst=null    perm=null
2014-06-24 16:56:51,378 INFO: org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit (logAuditMessage(7409)) - allowed=true  ugi=hyunsik (auth:SIMPLE)   ip=/127.0.0.1   cmd=contentSummary  src=/tajo/warehouse/table14 dst=null    perm=null
2014-06-24 16:56:51,378 INFO: org.apache.tajo.catalog.CatalogServer (createTable(523)) - relation "default.table14" is added to the catalog (127.0.0.1:16371)
2014-06-24 16:56:51,378 INFO: org.apache.tajo.master.GlobalEngine (createTableOnPath(742)) - Table default.table14 is created (48)

org.jboss.netty.channel.ChannelException: Failed to create a selector.
    at org.jboss.netty.channel.socket.nio.AbstractNioSelector.openSelector(AbstractNioSelector.java:337)
    at org.jboss.netty.channel.socket.nio.AbstractNioSelector.<init>(AbstractNioSelector.java:95)
    at org.jboss.netty.channel.socket.nio.AbstractNioWorker.<init>(AbstractNioWorker.java:53)
    at org.jboss.netty.channel.socket.nio.NioWorker.<init>(NioWorker.java:45)
    at org.jboss.netty.channel.socket.nio.NioWorkerPool.createWorker(NioWorkerPool.java:45)
    at org.jboss.netty.channel.socket.nio.NioWorkerPool.createWorker(NioWorkerPool.java:28)
    at org.jboss.netty.channel.socket.nio.AbstractNioWorkerPool.newWorker(AbstractNioWorkerPool.java:99)
    at org.jboss.netty.channel.socket.nio.AbstractNioWorkerPool.init(AbstractNioWorkerPool.java:69)
    at org.jboss.netty.channel.socket.nio.NioWorkerPool.<init>(NioWorkerPool.java:39)
    at org.apache.tajo.rpc.RpcChannelFactory.createClientChannelFactory(RpcChannelFactory.java:71)
    at org.apache.tajo.rpc.RpcConnectionPool.newPool(RpcConnectionPool.java:58)
    at org.apache.tajo.client.TajoClient.<init>(TajoClient.java:104)
    at org.apache.tajo.client.TajoClient.<init>(TajoClient.java:82)
    at org.apache.tajo.TajoTestingCluster.createTable(TajoTestingCluster.java:605)
    at org.apache.tajo.TajoTestingCluster.createTable(TajoTestingCluster.java:591)
    at org.apache.tajo.engine.query.TestJoinQuery.createOuterJoinTestTable(TestJoinQuery.java:936)
    at org.apache.tajo.engine.query.TestJoinQuery.testLeftOuterJoinPredicationCaseByCase3(TestJoinQuery.java:643)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    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.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    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.junit.runners.Suite.runChild(Suite.java:127)
    at org.junit.runners.Suite.runChild(Suite.java:26)
    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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.junit.runners.Suite.runChild(Suite.java:127)
    at org.junit.runners.Suite.runChild(Suite.java:26)
    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.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:77)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.io.IOException: Too many open files
    at sun.nio.ch.IOUtil.makePipe(Native Method)
    at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:65)
    at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
    at java.nio.channels.Selector.open(Selector.java:227)
    at org.jboss.netty.channel.socket.nio.AbstractNioSelector.openSelector(AbstractNioSelector.java:335)
    ... 62 more

[hyunsik]

Additionally, the latest patch needs rebase. I tried to rebase the patch against the latest revision. The above problem may be caused by my incorrect rebase.

[babokim]

Merged with trunk and test passed

[hyunsik]

+1

LGTM!