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https://issues.apache.org/jira/browse/HBASE-8206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615890#comment-13615890
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Manukranth Kolloju commented on HBASE-8206:
-------------------------------------------
We found that double locking was not necessarily thread safe and it might be
solved by doing the following :
if (codec == null) {
synchronized (lock) {
if (codec == null) {
GzipCodec tmpCodec = new ReusableStreamGzipCodec();
tmpCodec.setConf(new Configuration(conf));
codec = tmpCodec;
}
}
> Thread safety issues with Compression.Algorithm.GZ and SNAPPY
> -------------------------------------------------------------
>
> Key: HBASE-8206
> URL: https://issues.apache.org/jira/browse/HBASE-8206
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.89-fb
> Reporter: Manukranth Kolloju
> Priority: Minor
> Fix For: 0.89-fb
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> The Compression.Algorithm was not completely thread safe. Hence making it
> thread safe. Trying to fix this the same way it was fixed in HBase
> trunk(HBASE-5458) with a minor change since the fix in trunk is not
> completely thread safe.
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