See 
<https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex_Gradle/722/display/redirect?page=changes>

Changes:

[robertwb] [BEAM-4546] Implement hot key fanout for combiners.

[robertwb] Use discaring mode for first level of combine.

------------------------------------------
[...truncated 27.60 MB...]
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-41 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@3578dc0eidentifier=tcp://localhost:35275/7.output.5, 
upstream=7.output.5, group=stream48/9.data1, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@648cf7da{da=com.datatorrent.bufferserver.internal.DataList$Block@2ecc92d9{identifier=7.output.5,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@409bd4f5[identifier=7.output.5]
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=11,name=split2,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream65,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-35 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-35 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@7fcb7a8bidentifier=tcp://localhost:35275/11.output.9, 
upstream=11.output.9, group=stream65/13.data1, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@6d81b833{da=com.datatorrent.bufferserver.internal.DataList$Block@6e30b07e{identifier=11.output.9,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@2420bd3b[identifier=11.output.9]
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=4,name=split6,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream4,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-33 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-33 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@5ae61459identifier=tcp://localhost:35275/4.output.3, 
upstream=4.output.3, group=stream4/6.data1, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@3a02f936{da=com.datatorrent.bufferserver.internal.DataList$Block@5aa29e65{identifier=4.output.3,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@31fa760f[identifier=4.output.3]
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=15,name=split0,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream91,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-4 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-4 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@2585f559identifier=tcp://localhost:35275/15.output.12, 
upstream=15.output.12, group=stream91/16.data1, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@1012dc6e{da=com.datatorrent.bufferserver.internal.DataList$Block@3df45c13{identifier=15.output.12,
 data=1048576, readingOffset=0, writingOffset=2281, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@736bbc7e[identifier=15.output.12]
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=2,name=split8,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream8,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=8,name=split5,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream72,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-26 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-27 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-27 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-26 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=12,name=split3,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream135,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@79acf56bidentifier=tcp://localhost:35275/2.output.2, 
upstream=2.output.2, group=stream8/3.data1, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@11c3e612{da=com.datatorrent.bufferserver.internal.DataList$Block@17b4b9e8{identifier=2.output.2,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@83f7bc9[identifier=2.output.2]
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=14,name=split1,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream76,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-39 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@6d8b79bidentifier=tcp://localhost:35275/8.output.6, 
upstream=8.output.6, group=stream72/9.data2, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@2619befc{da=com.datatorrent.bufferserver.internal.DataList$Block@28e42f5b{identifier=8.output.6,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@1aadb856[identifier=8.output.6]
    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-57 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-39 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=1,name=split9,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream0,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-57 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@580f6b31identifier=tcp://localhost:35275/14.output.11, 
upstream=14.output.11, group=stream76/16.data2, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@69bf79f9{da=com.datatorrent.bufferserver.internal.DataList$Block@23ac46c{identifier=14.output.11,
 data=1048576, readingOffset=0, writingOffset=2353, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@b2dad87[identifier=14.output.11]
    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-21 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@3ac9eb16identifier=tcp://localhost:35275/12.output.10, 
upstream=12.output.10, group=stream135/13.data2, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@7cb5dbbc{da=com.datatorrent.bufferserver.internal.DataList$Block@6e571562{identifier=12.output.10,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@3a9ab560[identifier=12.output.10]
    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-21 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@347b060aidentifier=tcp://localhost:35275/1.output.1, 
upstream=1.output.1, group=stream0/3.data2, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@5c3d6621{da=com.datatorrent.bufferserver.internal.DataList$Block@e872e21{identifier=1.output.1,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@582dd696[identifier=1.output.1]
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.util.LoggerUtil 
getFileAppender
    WARNING: Log information is unavailable. To enable log information 
log4j/logging should be configured with single FileAppender that has 
immediateFlush set to true and log level set to ERROR or greater.
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.engine.StreamingContainer$2 
run
    SEVERE: Operator set 
[OperatorDeployInfo[id=5,name=split7,type=INPUT,checkpoint={ffffffffffffffff, 
0, 
0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=output,streamId=stream134,bufferServer=localhost]]]]
 stopped running due to an exception.
    com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$UmbilicalProtocolLocalImpl log
    INFO: container-52 msg: Stopped running due to an exception. 
com.datatorrent.api.Operator$ShutdownException
        at 
com.datatorrent.common.util.BaseOperator.shutdown(BaseOperator.java:96)
        at 
org.apache.beam.runners.apex.translation.operators.ApexReadUnboundedInputOperator.endWindow(ApexReadUnboundedInputOperator.java:116)
        at com.datatorrent.stram.engine.InputNode.run(InputNode.java:229)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1429)

    Jun 14, 2018 6:55:00 AM 
com.datatorrent.stram.StramLocalCluster$LocalStreamingContainerLauncher run
    INFO: Container container-52 terminating.
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$3 run
    INFO: Removing ln 
LogicalNode@2f82cbe4identifier=tcp://localhost:35275/5.output.4, 
upstream=5.output.4, group=stream134/6.data2, partitions=[], 
iterator=com.datatorrent.bufferserver.internal.DataList$DataListIterator@37f35946{da=com.datatorrent.bufferserver.internal.DataList$Block@c82df7{identifier=5.output.4,
 data=1048576, readingOffset=0, writingOffset=2381, 
starting_window=5b22114000000001, ending_window=5b2211400000000a, refCount=2, 
uniqueIdentifier=0, next=null, future=null}}} from dl 
DataList@3709ede9[identifier=5.output.4]
    Jun 14, 2018 6:55:00 AM com.datatorrent.bufferserver.server.Server$1 run
    INFO: Server stopped listening at /0:0:0:0:0:0:0:0:35275
    Jun 14, 2018 6:55:00 AM com.datatorrent.stram.StramLocalCluster run
    INFO: Application finished.

org.apache.beam.sdk.io.CountingSourceTest > testBoundedSourceSplits FAILED
    java.lang.AssertionError: UniqueCount/Flatten.PCollections.out: 
org/hamcrest/Matchers
        at 
org.apache.beam.sdk.testing.PAssert$PAssertionSite.capture(PAssert.java:168)
        at org.apache.beam.sdk.testing.PAssert.thatSingleton(PAssert.java:418)
        at org.apache.beam.sdk.testing.PAssert.thatSingleton(PAssert.java:408)
        at 
org.apache.beam.sdk.io.CountingSourceTest.addCountingAsserts(CountingSourceTest.java:66)
        at 
org.apache.beam.sdk.io.CountingSourceTest.testBoundedSourceSplits(CountingSourceTest.java:118)

        Caused by:
        java.lang.NoClassDefFoundError: org/hamcrest/Matchers

Gradle Test Executor 1 finished executing tests.

> Task :beam-runners-apex:validatesRunnerBatch FAILED

198 tests completed, 112 failed, 1 skipped
Finished generating test XML results (0.288 secs) into: 
<https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex_Gradle/ws/src/runners/apex/build/test-results/validatesRunnerBatch>
Generating HTML test report...
Finished generating test html results (0.225 secs) into: 
<https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex_Gradle/ws/src/runners/apex/build/reports/tests/validatesRunnerBatch>
:beam-runners-apex:validatesRunnerBatch (Thread[Task worker for ':' Thread 
13,5,main]) completed. Took 28 mins 3.396 secs.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':beam-runners-apex:validatesRunnerBatch'.
> There were failing tests. See the report at: 
> file://<https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex_Gradle/ws/src/runners/apex/build/reports/tests/validatesRunnerBatch/index.html>

* Try:
Run with --stacktrace option to get the stack trace. Run with --debug option to 
get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with 
Gradle 5.0.
See 
https://docs.gradle.org/4.8/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 28m 58s
32 actionable tasks: 28 executed, 4 from cache

Publishing build scan...
https://gradle.com/s/zwjyiab3ef26s

Build step 'Invoke Gradle script' changed build result to FAILURE
Build step 'Invoke Gradle script' marked build as failure
Recording test results
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