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[ZOOKEEPER-2342] Migrate to Log4J 2. - ZooKeeper - [issue]
...ZOOKEEPER-1371 removed our source code dependency on Log4J.  It appears that this also removed the Log4J SLF4J binding jar from the runtime classpath.  Without any SLF4J binding ja...
http://issues.apache.org/jira/browse/ZOOKEEPER-2342    Author: Chris Nauroth , 2019-08-27, 14:59
[HDFS-8432] Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases. - HDFS - [issue]
...Maintain the prior layout version during the upgrade window and reject attempts to use new features until after the upgrade has been finalized.  This guarantees that the prior software ...
http://issues.apache.org/jira/browse/HDFS-8432    Author: Chris Nauroth , 2019-08-20, 08:52
[HADOOP-13454] S3Guard: Provide custom FileSystem Statistics. - Hadoop - [issue]
...Provide custom FileSystem Statistics with information about the internal operational details of S3Guard....
http://issues.apache.org/jira/browse/HADOOP-13454    Author: Chris Nauroth , 2019-06-24, 22:34
[HDFS-9239] DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness - HDFS - [issue]
...This issue proposes introduction of a new feature: the DataNode Lifeline Protocol.  This is an RPC protocol that is responsible for reporting liveness and basic health information about...
http://issues.apache.org/jira/browse/HDFS-9239    Author: Chris Nauroth , 2019-05-21, 02:49
[HADOOP-11935] Provide optional native implementation of stat syscall. - Hadoop - [issue]
...Currently, RawLocalFileSystem.DeprecatedRawLocalFileStatus#loadPermissionInfo is implemented as forking an ls command and parsing the output.  This was observed to be a bottleneck in YA...
http://issues.apache.org/jira/browse/HADOOP-11935    Author: Chris Nauroth , 2019-04-28, 12:16
[HADOOP-14544] DistCp documentation for command line options is misaligned. - Hadoop - [issue]
...In the DistCp documentation, the Command Line Options section appears to be misaligned/incorrect in some of the Notes for release 2.7.3.  This is the current stable version, so it's lik...
http://issues.apache.org/jira/browse/HADOOP-14544    Author: Chris Nauroth , 2019-04-15, 01:44
[HADOOP-11127] Improve versioning and compatibility support in native library for downstream hadoop-common users. - Hadoop - [issue]
...There is no compatibility policy enforced on the JNI function signatures implemented in the native library.  This library typically is deployed to all nodes in a cluster, built from a s...
http://issues.apache.org/jira/browse/HADOOP-11127    Author: Chris Nauroth , 2019-02-19, 10:37
[YETUS-317] Website build instructions should recommend deploying Ruby via RVM. - Yetus - [issue]
...Deploying Ruby via system packaging like rpm or deb can be unpredictable.  It's not guaranteed that the OS will deploy a version that works well with the Yetus website build dependencie...
http://issues.apache.org/jira/browse/YETUS-317    Author: Chris Nauroth , 2018-12-29, 03:14
[HDFS-9572] Prevent DataNode log spam if a client connects on the data transfer port but sends no data. - HDFS - [issue]
...Monitoring tools may choose to check liveness of the DataNode's data transfer port by connecting to it.  The monitoring tool will close the connection immediately after establishment wi...
http://issues.apache.org/jira/browse/HDFS-9572    Author: Chris Nauroth , 2018-12-18, 02:25
[HDFS-11063] Set NameNode RPC server handler thread name with more descriptive information about the RPC call. - HDFS - [issue]
...We often run jstack on a NameNode process as a troubleshooting step if it is suffering high load or appears to be hanging.  By reading the stack trace, we can identify if a caller is bl...
http://issues.apache.org/jira/browse/HDFS-11063    Author: Chris Nauroth , 2018-11-23, 11:58