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Hudson commented on HDFS-6978: ------------------------------ FAILURE: Integrated in Hadoop-Yarn-trunk #698 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/698/]) HDFS-6978. Directory scanner should correctly reconcile blocks on RAM disk. (Arpit Agarwal) (arp: rev 9f22fb8c9a10952225e15c7b67b5f77fa44b155d) * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetTestUtil.java * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestLazyPersistFiles.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/LazyWriteReplicaTracker.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/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/BlockPoolSlice.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DirectoryScanner.java * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDirectoryScanner.java * hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-6581.txt > Directory scanner should correctly reconcile blocks on RAM disk > --------------------------------------------------------------- > > Key: HDFS-6978 > URL: https://issues.apache.org/jira/browse/HDFS-6978 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: datanode > Affects Versions: HDFS-6581 > Reporter: Arpit Agarwal > Assignee: Arpit Agarwal > Fix For: 3.0.0 > > Attachments: HDFS-6978.01.patch, HDFS-6978.02.patch > > > It used to be very unlikely that the directory scanner encountered two > replicas of the same block on different volumes. > With memory storage, it is very likely to hit this with the following > sequence of events: > # Block is written to RAM disk > # Lazy writer saves a copy on persistent volume > # DN attempts to evict the original replica from RAM disk, file deletion > fails as the replica is in use. > # Directory scanner finds a replica on both RAM disk and persistent storage. > The directory scanner should never delete the block on persistent storage. -- This message was sent by Atlassian JIRA (v6.3.4#6332)