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[HDFS-7425] NameNode block deletion logging uses incorrect appender. - HDFS - [issue]
...The NameNode uses 2 separate Log4J appenders for tracking state changes.  The appenders are named "org.apache.hadoop.hdfs.StateChange" and "BlockStateChange".  The intention of Blo...    Author: Chris Nauroth , 2016-08-30, 01:40
[HDFS-7714] Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode. - HDFS - [issue]
...In an HA deployment, DataNodes must register with both NameNodes and send periodic heartbeats and block reports to both.  However, if NameNodes and DataNodes are restarted simultaneousl...    Author: Chris Nauroth , 2016-08-30, 01:39
[HDFS-7833] DataNode reconfiguration does not recalculate valid volumes required, based on configured failed volumes tolerated. - HDFS - [issue]
...DataNode reconfiguration never recalculates FsDatasetImpl#validVolsRequired.  This may cause incorrect behavior of the dfs.datanode.failed.volumes.tolerated property if reconfiguration ...    Author: Chris Nauroth , 2016-08-30, 01:39
[HDFS-7988] Replace usage of ExactSizeInputStream with LimitInputStream. - HDFS - [issue]
...HDFS has a class named ExactSizeInputStream used in the protobuf translation layer.  This class wraps another InputStream, but constraints the readable bytes to a specified length. &nbs...    Author: Chris Nauroth , 2016-08-30, 01:38
[HDFS-8164] cTime is 0 in VERSION file for newly formatted NameNode. - HDFS - [issue]
...After formatting a NameNode and inspecting its VERSION file, the cTime property shows 0.  The value does get updated to current time during an upgrade, but I believe this is intended to...    Author: Chris Nauroth , 2016-08-30, 01:36
[HDFS-8290] WebHDFS calls before namesystem initialization can cause NullPointerException. - HDFS - [issue]
...The NameNode has a brief window of time when the HTTP server has been initialized, but the namesystem has not been initialized.  During this window, a WebHDFS call can cause a NullPoint...    Author: Chris Nauroth , 2016-08-30, 01:35
[VOTE] Release Apache Hadoop 2.7.3 RC1 - HDFS - [mail # dev]
...Andrew, thanks for adding your perspective on this.What is a realistic strategy for us to evolve the HDFS audit log in a backward-compatible way?  If the API is essentially any form of ...
   Author: Chris Nauroth , 2016-08-18, 17:04
[HDFS-6099] HDFS file system limits not enforced on renames. - HDFS - [issue]
...dfs.namenode.fs-limits.max-component-length and dfs.namenode.fs-limits.max-directory-items are not enforced on the destination path during rename operations.  This means that it's still...    Author: Chris Nauroth , 2016-08-08, 02:37
[HDFS-9362] TestAuditLogger#testAuditLoggerWithCallContext assumes Unix line endings, fails on Windows. - HDFS - [issue]
...TestAuditLogger#testAuditLoggerWithCallContext was added recently to exercise the new audit logging with caller context functionality.  The tests assume Unix line endings by hard-coding...    Author: Chris Nauroth , 2016-08-05, 05:57
[DISCUSS] Retire BKJM from trunk? - HDFS - [mail # dev]
...I recommend including the BookKeeper community in this discussion.  I’ve added their user@ and dev@ lists to this thread.I do not see BKJM being used in practice.  Removing it from...
   Author: Chris Nauroth , 2016-07-27, 19:06