Gopal V created HADOOP-10694:
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Summary: Remove synchronized input streams from Writable
deserialization
Key: HADOOP-10694
URL: https://issues.apache.org/jira/browse/HADOOP-10694
Project: Hadoop Common
Issue Type: Bug
Components: io
Reporter: Gopal V
Assignee: Gopal V
Attachments: writable-read-sync.png
Writable deserialization is slowing down due to a synchronized block within
DataInputBuffer$Buffer.
ByteArrayInputStream::read() is synchronized and this shows up as a slow
uncontested lock.
Hive ships with its own faster thread-unsafe version with
hive.common.io.NonSyncByteArrayInputStream.
!writable-read-sync.png!
The DataInputBuffer and Writable deserialization should not require a lock per
readInt()/read().
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