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[jira] [HBASE-5387] Reuse compression streams in HFileBlock.Writer
Summary: We need to to reuse compression streams in HFileBlock.Writer instead of
allocating them every time. The motivation is that when using Java's built-in
implementation of Gzip, we allocate a new GZIPOutputStream object and an
associated native data structure any time. This is one suspected cause of recent
TestHFileBlock failures on Hadoop QA:
https://builds.apache.org/job/HBase-TRUNK/2658/testReport/org.apache.hadoop.hbase.io.hfile/TestHFileBlock/testPreviousOffset_1_/.
Test Plan:
* Run unit tests
* Create a GZIP-compressed CF with new code, load some data, shut down HBase,
deploy old code, restart HBase, and scan the table
Reviewers: tedyu, Liyin, dhruba, JIRA, lhofhansl
Reviewed By: lhofhansl
CC: tedyu, lhofhansl, mbautin
Differential Revision: https://reviews.facebook.net/D1719
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hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/Compression.java