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[HDFS-3967] NN should bail our earlier when logs to load have a gap - HDFS - [issue]
...i was testing an HA setup with a lowered edit log retention period, and ended up in a state where one of the two NNs had fallen too far behind, such that it couldn't start up again (due to t...
http://issues.apache.org/jira/browse/HDFS-3967    Author: Todd Lipcon, 2012-09-21, 21:40
[HDFS-2991] failure to load edits: ClassCastException - HDFS - [issue]
...In doing scale testing of trunk at r1291606, I hit the following:java.io.IOException: Error replaying edit log at offset 1354251Recent opcode offsets: 1350014 1350176 1350312 1354251 &n...
http://issues.apache.org/jira/browse/HDFS-2991    Author: Todd Lipcon, 2012-09-20, 23:23
[HDFS-3956] QJM: purge temporary files when no longer within retention period - HDFS - [issue]
...After doing a bunch of fault testing, I noticed that the JNs had a bunch of temporary files left around in their journal directories which were no longer within the retention period. For exa...
http://issues.apache.org/jira/browse/HDFS-3956    Author: Todd Lipcon, 2012-09-20, 00:43
[HDFS-3950] QJM: misc TODO cleanup, improved log messages, etc - HDFS - [issue]
...General JIRA for a bunch of miscellaneous clean-up in the QJM branch: fix most remaining TODOs improve some log/error messages add some more sanity checks where appropriate address any findb...
http://issues.apache.org/jira/browse/HDFS-3950    Author: Todd Lipcon, 2012-09-20, 00:30
[HDFS-3955] QJM: Make acceptRecovery() atomic - HDFS - [issue]
...Per one of the TODOs in Journal.java, there is currently a lack of atomicity in the acceptRecovery() code path. In particular, we have the following actions executed non-atomically: Download...
http://issues.apache.org/jira/browse/HDFS-3955    Author: Todd Lipcon, 2012-09-19, 19:57
[HDFS-3943] QJM: remove currently unused "md5sum" field. - HDFS - [issue]
...Per later discussion in HDFS-3859, it turns out to be rather difficult to integrate md5sum verification into QJM at this point. The crux of the issue is that different replicas may be semant...
http://issues.apache.org/jira/browse/HDFS-3943    Author: Todd Lipcon, 2012-09-17, 22:52
[HDFS-3859] QJM: implement md5sum verification - HDFS - [issue]
...When the QJM passes journal segments between nodes, it should use an md5sum field to make sure the data doesn't get corrupted during transit. This also serves as an extra safe-guard to make ...
http://issues.apache.org/jira/browse/HDFS-3859    Author: Todd Lipcon, 2012-09-17, 22:28
[HDFS-3894] QJM: testRecoverAfterDoubleFailures can be flaky due to IPC client caching - HDFS - [issue]
...TestQJMWithFaults.testRecoverAfterDoubleFailures fails really occasionally. Looking into it, the issue seems to be that it's possible by random chance for an IPC server port to be reused bet...
http://issues.apache.org/jira/browse/HDFS-3894    Author: Todd Lipcon, 2012-09-14, 00:00
[HDFS-3906] QJM: quorum timeout on failover with large log segment - HDFS - [issue]
...In doing some stress tests, I ran into an issue with failover if the current edit log segment written by the old active is large. With a 327MB log segment containing 6.4M transactions, the J...
http://issues.apache.org/jira/browse/HDFS-3906    Author: Todd Lipcon, 2012-09-11, 07:32
[HDFS-3915] QJM: Failover fails with auth error in secure cluster - HDFS - [issue]
...When testing failover in a secure cluster with QJM, we ran into the following error:java.io.IOException: Exception trying to open authenticated connection to http://xxxxx:8480/getJournal?jid...
http://issues.apache.org/jira/browse/HDFS-3915    Author: Todd Lipcon, 2012-09-11, 05:53
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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