Mukul Kumar Singh created HDDS-1372:
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             Summary: getContainerWithPipeline for a standalone pipeline fails 
with ConcurrentModificationException
                 Key: HDDS-1372
                 URL: https://issues.apache.org/jira/browse/HDDS-1372
             Project: Hadoop Distributed Data Store
          Issue Type: Bug
          Components: SCM
    Affects Versions: 0.5.0
            Reporter: Mukul Kumar Singh


The excception is hit while fetching a pipeline during read.

{code}
2019-04-03 00:52:50,125 WARN  ipc.Server (Server.java:logException(2724)) - IPC 
Server handler 16 on 59758, call Call#2270 Retry#0 
org.apache.hadoop.hdds.scm.protocol.StorageContainerLocationProtocol.getC
ontainerWithPipeline from 192.168.0.108:60011
java.util.ConcurrentModificationException
        at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1558)
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
        at 
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
        at 
java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
        at 
org.apache.hadoop.hdds.scm.server.SCMClientProtocolServer.getContainerWithPipeline(SCMClientProtocolServer.java:252)
        at 
org.apache.hadoop.ozone.protocolPB.StorageContainerLocationProtocolServerSideTranslatorPB.getContainerWithPipeline(StorageContainerLocationProtocolServerSideTranslatorPB.java:144)
        at 
org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos$StorageContainerLocationProtocolService$2.callBlockingMethod(StorageContainerLocationProtocolProtos.java:16390)
        at 
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)
{code}



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