This is the documentation for CDH 5.1.x. Documentation for other versions is available at Cloudera Documentation.
Known Issues Fixed in CDH 5.1.3
The following topics describe known issues fixed in CDH 5.1.3. See What's New in CDH 5.1.3 for a list of the most important upstream problems fixed in this release.
Apache Hadoop
— The default setting of dfs.client.block.write.replace-datanode-on-failure.policy can cause an unrecoverable error in small clusters
The default setting of dfs.client.block.write.replace-datanode-on-failure.policy (DEFAULT) can cause an unrecoverable error in a small cluster during HBase rolling restart.
Bug: HDFS-4257
Severity: Medium
Workaround: Set dfs.client.block.write.replace-datanode-on-failure.policy to NEVER for 1- 2- or 3-node clusters, and leave it as DEFAULT for all other clusters. Leave dfs.client.block.write.replace-datanode-on-failure.enable set to true .
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