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

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

Rohini Palaniswamy created TEZ-3242:
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             Summary: 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


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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