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https://issues.apache.org/jira/browse/HDFS-12830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16256400#comment-16256400
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Yiqun Lin commented on HDFS-12830:
----------------------------------
Attach the patch to reset dn number for mini cluster.
> Ozone: TestOzoneRpcClient#testPutKeyRatisThreeNodes fails
> ---------------------------------------------------------
>
> Key: HDFS-12830
> URL: https://issues.apache.org/jira/browse/HDFS-12830
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Affects Versions: HDFS-7240
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Attachments: HDFS-12830-HDFS-7240.001.patch
>
>
> The test {{TestOzoneRpcClient#testPutKeyRatisThreeNodes}} always fails in the
> feature branch. Stack trace:
> {noformat}
> 2017-11-16 11:44:28,512 [IPC Server handler 7 on 43551] ERROR
> ratis.RatisManagerImpl (RatisManagerImpl.java:getPipeline(130)) - Get
> pipeline call failed. We are not able to find free nodes or operational
> pipeline.
> 2017-11-16 11:44:28,513 [IPC Server handler 7 on 43551] WARN ipc.Server
> (Server.java:logException(2721)) - IPC Server handler 7 on 43551, call
> Call#679 Retry#0
> org.apache.hadoop.ozone.protocol.ScmBlockLocationProtocol.allocateScmBlock
> from 172.17.0.2:42671
> java.lang.NullPointerException
> at
> org.apache.hadoop.scm.container.common.helpers.ContainerInfo.getProtobuf(ContainerInfo.java:132)
> at
> org.apache.hadoop.ozone.scm.container.ContainerMapping.allocateContainer(ContainerMapping.java:221)
> at
> org.apache.hadoop.ozone.scm.block.BlockManagerImpl.preAllocateContainers(BlockManagerImpl.java:190)
> at
> org.apache.hadoop.ozone.scm.block.BlockManagerImpl.allocateBlock(BlockManagerImpl.java:292)
> at
> org.apache.hadoop.ozone.scm.StorageContainerManager.allocateBlock(StorageContainerManager.java:1047)
> at
> org.apache.hadoop.ozone.protocolPB.ScmBlockLocationProtocolServerSideTranslatorPB.allocateScmBlock(ScmBlockLocationProtocolServerSideTranslatorPB.java:107)
> at
> {noformat}
> The warn log {{Get pipeline call failed. We are not able to find free nodes
> or operational pipeline.}} is the failed reason. This is broken by the change
> in HDFS-12756. It missed resetting datanode num.
> {code}
> - cluster = new MiniOzoneCluster.Builder(conf).numDataNodes(5)
> + cluster = new MiniOzoneClassicCluster.Builder(conf)
> {code}
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