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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2019/06/06 06:02:10 UTC
[GitHub] [hadoop] supratimdeka opened a new pull request #917: HDDS-1621.
writeData in ChunkUtils should not use AsynchronousFileChannel. Contributed
by Supratim Deka
supratimdeka opened a new pull request #917: HDDS-1621. writeData in ChunkUtils should not use AsynchronousFileChannel. Contributed by Supratim Deka
URL: https://github.com/apache/hadoop/pull/917
https://issues.apache.org/jira/browse/HDDS-1621
2 changes:
1. invoking a force+close on the channel inside writeData if dfs.container.chunk.write.sync is true. The force is triggered outside of the file lock, to avoid unnecessary lock contention.
2. change AsynchronousFileChannel to FileChannel for writing the file. This is the right thing to do because writeStateMachineData is already scheduling the write chunk requests asynchronously on threads from XceiverServerRatis.chunkExecutor.
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