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[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...
http://issues.apache.org/jira/browse/HDFS-8290    Author: Chris Nauroth, 2015-05-02, 02:01
[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 ...
http://issues.apache.org/jira/browse/HDFS-7833    Author: Chris Nauroth, 2015-04-25, 02:03
[expand - 1 more] - Re: fsck output compatibility question with regard to HDFS-7281 - HDFS - [mail # dev]
...Metrics/JMX is covered by our compatibility guidelines:http://hadoop.apache.org/docs/r2.7.0/hadoop-project-dist/hadoop-common/Compatibility.html#MetricsJMXMetrics/JMX is similar to our usage...
   Author: Chris Nauroth, 2015-04-24, 19:37
Re: Non-HA rollback compatibility broken - HDFS - [mail # dev]
...Hello Andreina,Thank you for reporting this.  Would you please go ahead and open a jira issue?  We'll definitely need to do something to address this (either a code fix or a docume...
   Author: Chris Nauroth, 2015-04-22, 16:14
Re: Set minimum version of Hadoop 3 to JDK 8 - HDFS - [mail # dev]
...Suppose we configure maven-compiler-plugin with  set to 1.7 but set to 1.8 in trunk.  I believe this would have the effect ofgenerating JDK 8 bytecode, but enforcing that our ...
   Author: Chris Nauroth, 2015-04-22, 04:08
[HDFS-7604] Track and display failed DataNode storage locations in NameNode. - HDFS - [issue]
...During heartbeats, the DataNode can report a list of its storage locations that have been taken out of service due to failure (such as due to a bad disk or a permissions problem).  The ...
http://issues.apache.org/jira/browse/HDFS-7604    Author: Chris Nauroth, 2015-04-21, 21:59
Re: libhdfs installation - HDFS - [mail # dev]
...Hello Abhishek,You can build libhdfs from source by running mvn with the "native" profileactivated, as described in BUILDING.txt here:https://github.com/apache/hadoop/blob/trunk/BUILDING.txt...
   Author: Chris Nauroth, 2015-04-21, 04:49
[HDFS-6600] fsck -move fails in secured clusters. - HDFS - [issue]
...In a secured cluster, running hdfs fsck -move fails.  When trying to move the recovered blocks to lost+found, fsck tries to start using a DFSClient, but it doesn't have the credentials ...
http://issues.apache.org/jira/browse/HDFS-6600    Author: Chris Nauroth, 2015-04-21, 03:40
[HDFS-5995] TestFSEditLogLoader#testValidateEditLogWithCorruptBody gets OutOfMemoryError and dumps heap. - HDFS - [issue]
...TestFSEditLogLoader#testValidateEditLogWithCorruptBody is experiencing OutOfMemoryError and dumping heap since the merge of HDFS-4685.  This doesn't actually cause the test to fail, bec...
http://issues.apache.org/jira/browse/HDFS-5995    Author: Chris Nauroth, 2015-04-16, 20:58
[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...
http://issues.apache.org/jira/browse/HDFS-8164    Author: Chris Nauroth, 2015-04-16, 20:18
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB