[
https://issues.apache.org/jira/browse/HDFS-9866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15171230#comment-15171230
]
Hudson commented on HDFS-9866:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #9386 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/9386/])
HDFS-9866. BlockManager#chooseExcessReplicasStriped may weaken rack (jing9: rev
408f2c807bbaaaa37ce1b69a5dfa9d76ed427d6e)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestReplicationPolicyWithUpgradeDomain.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestReplicationPolicyWithNodeGroup.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicy.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestReconstructStripedBlocksWithRackAwareness.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/ErasureCodingWork.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestReplicationPolicy.java
> BlockManager#chooseExcessReplicasStriped may weaken rack fault tolerance
> ------------------------------------------------------------------------
>
> Key: HDFS-9866
> URL: https://issues.apache.org/jira/browse/HDFS-9866
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: 3.0.0
> Reporter: Takuya Fukudome
> Assignee: Jing Zhao
> Fix For: 3.0.0
>
> Attachments: HDFS-9866.000.patch
>
>
> In [~tfukudom]'s system tests, we find the following issue:
> A striped block group B has redundant internal block replicas. 9 internal
> blocks are stored in 10 datanodes across 6 racks. Datanode d1 and d2 both
> store a replica for internal block b1. d1's rack contains multiple internal
> blocks while d2's rack only has b1. Then when choosing a duplicated replica
> to delete, the current implementation may wrongly choose d2 thus causes the
> total number of racks to be decreased to 5.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
