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https://issues.apache.org/jira/browse/ACCUMULO-4153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15166337#comment-15166337
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ASF GitHub Bot commented on ACCUMULO-4153:
------------------------------------------
Github user phrocker commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/73#discussion_r54026666
--- Diff:
core/src/main/java/org/apache/accumulo/core/file/rfile/bcfile/Compression.java
---
@@ -147,25 +148,27 @@ public synchronized OutputStream
createCompressionStream(OutputStream downStream
},
GZ(COMPRESSION_GZ) {
- private transient DefaultCodec codec;
+ private transient AtomicReference<DefaultCodec> codec = new
AtomicReference<DefaultCodec>();
@Override
- synchronized CompressionCodec getCodec() {
- if (codec == null) {
- codec = new DefaultCodec();
- codec.setConf(conf);
+ CompressionCodec getCodec() {
+ DefaultCodec resultCodec = codec.get();
+ if (null == resultCodec) {
+ DefaultCodec newCodec = new DefaultCodec();
--- End diff --
I had tunnel vision when I looked at the change and didn't even spend much
time looking or thinking about anything else. You guys are absolutely right and
that negates the need for the AtomicReference. I'll try and apply some time
tomorrow to make these changes.
> Change getCodec method in BCFile's Compression class
> ----------------------------------------------------
>
> Key: ACCUMULO-4153
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4153
> Project: Accumulo
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.6.5
> Reporter: marco polo
> Assignee: marco polo
> Priority: Minor
> Fix For: 1.6.6, 1.7.2, 1.8.0
>
> Attachments: patchCompression
>
>
> Seeing major blockages blockages on the Synchronized method of getCodec. My
> initial change was to change it to double checked locking; however, spoke
> with [~kturner] and I'm changing this to an AtomicReference. Have a patch for
> the former but am in the process of testing the AtomicReference patch
> Note this is for Gzip
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