[jira] [Updated] (TEZ-3242) Reduce bytearray copy with TezEvent Serialization and deserialization

["Rohini Palaniswamy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TEZ-3242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rohini Palaniswamy updated TEZ-3242:
------------------------------------
    Attachment: TEZ-3242-1.patch

> Reduce bytearray copy with TezEvent Serialization and deserialization
> ---------------------------------------------------------------------
>
>                 Key: TEZ-3242
>                 URL: https://issues.apache.org/jira/browse/TEZ-3242
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Rohini Palaniswamy
>            Assignee: Rohini Palaniswamy
>         Attachments: TEZ-3242-1.patch
>
>
> Byte arrays are created for serializing protobuf messages and parsing them which creates lot of garbage when we have lot of events. 
> {code}
> java.lang.OutOfMemoryError: Java heap space
> 	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)
> 	at java.io.DataOutputStream.write(DataOutputStream.java:107)
> 	at java.io.FilterOutputStream.write(FilterOutputStream.java:97)
> 	at org.apache.tez.runtime.api.impl.TezEvent.serializeEvent(TezEvent.java:197)
> 	at org.apache.tez.runtime.api.impl.TezEvent.write(TezEvent.java:268)
> 	at org.apache.tez.runtime.api.impl.TezHeartbeatResponse.write(TezHeartbeatResponse.java:95)
> 	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.Server.setupResponse(Server.java:2496)
> {code}



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