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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7496) Fix FsVolume removal race conditions on the DataNode by reference-counting the volume instances
Date Wed, 21 Jan 2015 11:35:37 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14285522#comment-14285522
] 

Hudson commented on HDFS-7496:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #814 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/814/])
HDFS-7496. Fix FsVolume removal race conditions on the DataNode by reference-counting the
volume instances (lei via cmccabe) (cmccabe: rev b7f4a3156c0f5c600816c469637237ba6c9b330c)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeImpl.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/extdataset/ExternalVolumeImpl.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/extdataset/ExternalDatasetImpl.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDirectoryScanner.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/SimulatedFSDataset.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeReference.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/FsVolumeSpi.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/RamDiskAsyncLazyPersistService.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/ReplicaHandler.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestWriteBlockGetsBlockLengthHint.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestFsDatasetImpl.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeHotSwapVolumes.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockReceiver.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeListTest.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/FsDatasetSpi.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockRecovery.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestWriteToReplica.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/proto/datatransfer.proto
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetAsyncDiskService.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/ReplicaInputStreams.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeList.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestSimulatedFSDataset.java
HDFS-7496: add to CHANGES.txt (cmccabe: rev 73b72a048f70c275051747d13dc948845f4cef17)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> Fix FsVolume removal race conditions on the DataNode by reference-counting the volume
instances
> -----------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7496
>                 URL: https://issues.apache.org/jira/browse/HDFS-7496
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Colin Patrick McCabe
>            Assignee: Lei (Eddy) Xu
>             Fix For: 3.0.0
>
>         Attachments: HDFS-7496.000.patch, HDFS-7496.001.patch, HDFS-7496.002.patch, HDFS-7496.003.patch,
HDFS-7496.003.patch, HDFS-7496.004.patch, HDFS-7496.005.patch, HDFS-7496.006.patch, HDFS-7496.007.patch
>
>
> We discussed a few FsVolume removal race conditions on the DataNode in HDFS-7489.  We
should figure out a way to make removing an FsVolume safe.



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