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[HDFS-3862] QJM: don't require a fencer to be configured if shared storage has built-in single-writer semantics - HDFS - [issue]
...Currently, NN HA requires that the administrator configure a fencing method to ensure that only a single NameNode may write to the shared storage at a time. Some shared edits storage impleme...
http://issues.apache.org/jira/browse/HDFS-3862    Author: Todd Lipcon, 2015-05-03, 12:48
[YARN-59] "Text File Busy" errors launching MR tasks - YARN - [issue]
...Some very small percentage of tasks fail with a "Text file busy" error.The following was the original diagnosis:Our use of PrintWriter in TaskController.writeCommand is unsafe, since that cl...
http://issues.apache.org/jira/browse/YARN-59    Author: Todd Lipcon, 2015-05-03, 02:08
[HDFS-5058] QJM should validate startLogSegment() more strictly - HDFS - [issue]
...We've seen a small handful of times a case where one of the NNs in an HA cluster ends up with an fsimage checkpoint that falls in the middle of an edit segment. We're not sure yet how this h...
http://issues.apache.org/jira/browse/HDFS-5058    Author: Todd Lipcon, 2015-05-02, 21:36
[HADOOP-9112] test-patch should -1 for @Tests without a timeout - Hadoop - [issue]
...With our current test running infrastructure, if a test with no timeout set runs too long, it triggers a surefire-wide timeout, which for some reason doesn't show up as a failed test in the ...
http://issues.apache.org/jira/browse/HADOOP-9112    Author: Todd Lipcon, 2015-05-02, 01:44
[HADOOP-7334] test-patch should check for hard tabs - Hadoop - [issue]
...Our coding guidelines say that hard tabs are disallowed in the Hadoop code, but they sometimes sneak in (there are about 280 in the common codebase at the moment).We should run a simple chec...
http://issues.apache.org/jira/browse/HADOOP-7334    Author: Todd Lipcon, 2015-05-02, 01:44
[HDFS-4176] EditLogTailer should call rollEdits with a timeout - HDFS - [issue]
...When the EditLogTailer thread calls rollEdits() on the active NN via RPC, it currently does so without a timeout. So, if the active NN has frozen (but not actually crashed), this call can ha...
http://issues.apache.org/jira/browse/HDFS-4176    Author: Todd Lipcon, 2015-05-01, 00:27
[HBASE-5980] Scanner responses from RS should include metrics on rows/KVs filtered - HBase - [issue]
...Currently it's difficult to know, when issuing a filter, what percentage of rows were skipped by that filter. We should expose some basic counters back to the client scanner object. For exam...
http://issues.apache.org/jira/browse/HBASE-5980    Author: Todd Lipcon, 2015-04-30, 01:34
[HADOOP-7107] Ability to retrigger Hudson QA bot without re-uploading patch - Hadoop - [issue]
...Currently to retrigger the test-patch bot you have to upload a new patch. This doesn't work well for a couple cases: sometimes a build fails due to issues on a build machine (eg all tests ti...
http://issues.apache.org/jira/browse/HADOOP-7107    Author: Todd Lipcon, 2015-04-26, 02:12
[HDFS-2009] test-patch comment doesn't show names of failed FI tests - HDFS - [issue]
...Looks like test-patch.sh only looks at the build/test/*xml test results, but it should also look at build-fi/test/*xml I think...
http://issues.apache.org/jira/browse/HDFS-2009    Author: Todd Lipcon, 2015-04-26, 01:53
[HADOOP-8344] Improve test-patch to make it easier to find javadoc warnings - Hadoop - [issue]
...Often I have to spend a lot of time digging through logs to find javadoc warnings as the result of a test-patch. Similar to the improvement made in HADOOP-8339, we should do the following: t...
http://issues.apache.org/jira/browse/HADOOP-8344    Author: Todd Lipcon, 2015-04-26, 00:54
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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