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Posted to common-issues@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/05/17 02:56:25 UTC
[jira] [Created] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Todd Lipcon created HADOOP-8406:
-----------------------------------
Summary: CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Key: HADOOP-8406
URL: https://issues.apache.org/jira/browse/HADOOP-8406
Project: Hadoop Common
Issue Type: Bug
Components: io
Affects Versions: 2.0.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
CompressionCodecFactory defines CODEC_PROVIDERS as:
{code}
private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
ServiceLoader.load(CompressionCodec.class);
{code}
but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277543#comment-13277543 ]
Todd Lipcon commented on HADOOP-8406:
-------------------------------------
Failure is a known bad test. I'll commit this momentarily.
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.1
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277571#comment-13277571 ]
Hudson commented on HADOOP-8406:
--------------------------------
Integrated in Hadoop-Common-trunk-Commit #2257 (See [https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2257/])
HADOOP-8406. CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe. Contributed by Todd Lipcon. (Revision 1339476)
Result = SUCCESS
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1339476
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CompressionCodecFactory.java
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.1
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Updated] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon updated HADOOP-8406:
--------------------------------
Status: Patch Available (was: Open)
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Hadoop QA (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277515#comment-13277515 ]
Hadoop QA commented on HADOOP-8406:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12527752/hadoop-8406.txt
against trunk revision .
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified tests.
Please justify why no new tests are needed for this patch.
Also please list what manual steps were performed to verify this patch.
+1 javac. The applied patch does not increase the total number of javac compiler warnings.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 eclipse:eclipse. The patch built with eclipse:eclipse.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings.
+1 release audit. The applied patch does not increase the total number of release audit warnings.
-1 core tests. The patch failed these unit tests in hadoop-common-project/hadoop-common:
org.apache.hadoop.fs.viewfs.TestViewFsTrash
+1 contrib tests. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/999//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/999//console
This message is automatically generated.
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277739#comment-13277739 ]
Hudson commented on HADOOP-8406:
--------------------------------
Integrated in Hadoop-Hdfs-trunk #1048 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1048/])
HADOOP-8406. CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe. Contributed by Todd Lipcon. (Revision 1339476)
Result = SUCCESS
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1339476
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CompressionCodecFactory.java
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.1
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277578#comment-13277578 ]
Hudson commented on HADOOP-8406:
--------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #2274 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/2274/])
HADOOP-8406. CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe. Contributed by Todd Lipcon. (Revision 1339476)
Result = ABORTED
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1339476
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CompressionCodecFactory.java
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.1
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277827#comment-13277827 ]
Hudson commented on HADOOP-8406:
--------------------------------
Integrated in Hadoop-Mapreduce-trunk #1082 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1082/])
HADOOP-8406. CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe. Contributed by Todd Lipcon. (Revision 1339476)
Result = SUCCESS
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1339476
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CompressionCodecFactory.java
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.1
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Updated] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon updated HADOOP-8406:
--------------------------------
Attachment: hadoop-8406.txt
Attached patch synchronizes the iteration over this list.
I didn't add a unit test because it would be nearly impossible to write one that failed reliably, since it only affects the very first call after the class has been classloaded.
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277565#comment-13277565 ]
Hudson commented on HADOOP-8406:
--------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #2331 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/2331/])
HADOOP-8406. CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe. Contributed by Todd Lipcon. (Revision 1339476)
Result = SUCCESS
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1339476
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CompressionCodecFactory.java
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.1
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277303#comment-13277303 ]
Todd Lipcon commented on HADOOP-8406:
-------------------------------------
In practice I'm seeing this cause an occasional failure of the first HDFS saveNamespace operation if there are many storage directories configured, because all of the saver threads start and call this function at about the same time.
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Updated] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon updated HADOOP-8406:
--------------------------------
Resolution: Fixed
Fix Version/s: 2.0.1
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Committed to branch-2 and trunk.
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.1
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
--
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[jira] [Commented] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Eli Collins (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277480#comment-13277480 ]
Eli Collins commented on HADOOP-8406:
-------------------------------------
+1 pending jenkins
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
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[jira] [Closed] (HADOOP-8406)
CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
Posted by "Arun C Murthy (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-8406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arun C Murthy closed HADOOP-8406.
---------------------------------
> CompressionCodecFactory.CODEC_PROVIDERS iteration is thread-unsafe
> ------------------------------------------------------------------
>
> Key: HADOOP-8406
> URL: https://issues.apache.org/jira/browse/HADOOP-8406
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 2.0.0-alpha
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 2.0.2-alpha
>
> Attachments: hadoop-8406.txt
>
>
> CompressionCodecFactory defines CODEC_PROVIDERS as:
> {code}
> private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
> ServiceLoader.load(CompressionCodec.class);
> {code}
> but this is a lazy collection which is thread-unsafe to iterate. We either need to synchronize when we iterate over it, or we need to materialize it during class-loading time by copying to a non-lazy collection
--
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