Yiqun Lin created HDFS-11142:
--------------------------------
Summary:
TestLargeBlockReport#testBlockReportSucceedsWithLargerLengthLimit fails in trunk
Key: HDFS-11142
URL: https://issues.apache.org/jira/browse/HDFS-11142
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Yiqun Lin
Assignee: Yiqun Lin
The test {{TestLargeBlockReport#testBlockReportSucceedsWithLargerLengthLimit}}
fails in trunk. I looked into this, it seemed the long-time gc caused the
datanode to be shutdown unexpectedly when did the large block reporting. And
then the NPE thew in the test. The related output log:
{code}
2016-11-15 11:31:18,889 [DataNode:
[[[DISK]file:/testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/2/dfs/data/data1,
[DISK]file:/testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/2/dfs/data/data2]]
heartbeating to localhost/127.0.0.1:51450] INFO datanode.DataNode
(BPServiceActor.java:blockReport(415)) - Successfully sent block report
0x2ae5dd91bec02273, containing 2 storage report(s), of which we sent 2. The
reports had 0 total blocks and used 1 RPC(s). This took 0 msec to generate and
49 msecs for RPC and NN processing. Got back one command: FinalizeCommand/5.
2016-11-15 11:31:18,890 [DataNode:
[[[DISK]file:/testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/2/dfs/data/data1,
[DISK]file:/testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/2/dfs/data/data2]]
heartbeating to localhost/127.0.0.1:51450] INFO datanode.DataNode
(BPOfferService.java:processCommandFromActive(696)) - Got finalize command for
block pool BP-814229154-172.17.0.3-1479209475497
2016-11-15 11:31:24,026
[org.apache.hadoop.util.JvmPauseMonitor$Monitor@97e93f1] INFO
util.JvmPauseMonitor (JvmPauseMonitor.java:run(205)) - Detected pause in JVM or
host machine (eg GC): pause of approximately 4936ms
GC pool 'PS MarkSweep' had collection(s): count=1 time=4194ms
GC pool 'PS Scavenge' had collection(s): count=1 time=765ms
2016-11-15 11:31:24,026
[org.apache.hadoop.util.JvmPauseMonitor$Monitor@5a4bef8] INFO
util.JvmPauseMonitor (JvmPauseMonitor.java:run(205)) - Detected pause in JVM or
host machine (eg GC): pause of approximately 4898ms
GC pool 'PS MarkSweep' had collection(s): count=1 time=4194ms
GC pool 'PS Scavenge' had collection(s): count=1 time=765ms
2016-11-15 11:31:24,114 [main] INFO hdfs.MiniDFSCluster
(MiniDFSCluster.java:shutdown(1943)) - Shutting down the Mini HDFS Cluster
2016-11-15 11:31:24,114 [main] INFO hdfs.MiniDFSCluster
(MiniDFSCluster.java:shutdownDataNodes(1983)) - Shutting down DataNode 0
{code}
The stack infos:
{code}
java.lang.NullPointerException: null
at
org.apache.hadoop.hdfs.server.datanode.TestLargeBlockReport.testBlockReportSucceedsWithLargerLengthLimit(TestLargeBlockReport.java:97)
{code}
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