[jira] [Created] (TEZ-3942) RPC getTask writable optimization invalid in hadoop 2.8+

["Jonathan Eagles (JIRA)" <ji...@apache.org>]

Jonathan Eagles created TEZ-3942:
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             Summary: RPC getTask writable optimization invalid in hadoop 2.8+
                 Key: TEZ-3942
                 URL: https://issues.apache.org/jira/browse/TEZ-3942
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Jonathan Eagles


TEZ-3140 added an optimization to improve performance of RPC writable. HADOOP-13426 added in hadoop 2.8 has invalidated the assumption of the added optimization by changing the underlying output buffer.
{noformat}
"IPC Server handler 25 on 35274" #85 daemon prio=5 os_prio=0 tid=0x00000000022c0000 nid=0x1b40f runnable [0x00002ba1a6627000]
   java.lang.Thread.State: RUNNABLE
        at java.util.Arrays.copyOf(Arrays.java:3236)
        at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:118)
        at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93)
        at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:153)
        - locked <0x000000072fe9ac68> (a org.apache.hadoop.ipc.ResponseBuffer$FramedBuffer)
        at java.io.DataOutputStream.write(DataOutputStream.java:107)
        - locked <0x000000072fe9ac48> (a org.apache.hadoop.ipc.ResponseBuffer)
        at org.apache.tez.dag.api.EntityDescriptor.write(EntityDescriptor.java:121)
        at org.apache.tez.runtime.api.impl.InputSpec.write(InputSpec.java:66)
        at org.apache.tez.runtime.api.impl.TaskSpec.write(TaskSpec.java:174)
        at org.apache.tez.common.ContainerTask.write(ContainerTask.java:77)
        at org.apache.hadoop.io.ObjectWritable.writeObject(ObjectWritable.java:202)
        at org.apache.hadoop.io.ObjectWritable.writeObject(ObjectWritable.java:128)
        at org.apache.hadoop.io.ObjectWritable.write(ObjectWritable.java:82)
        at org.apache.hadoop.ipc.RpcWritable$WritableWrapper.writeTo(RpcWritable.java:75)
        at org.apache.hadoop.ipc.Server.setupResponseForWritable(Server.java:2807)
        at org.apache.hadoop.ipc.Server.setupResponse(Server.java:2792)
        at org.apache.hadoop.ipc.Server.setupResponse(Server.java:2766)
        at org.apache.hadoop.ipc.Server.access$100(Server.java:138)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:905)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:810)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1949)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2523)
{noformat}



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