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[HDFS-3863] QJM: track last "committed" txid - HDFS - [issue]
...Per some discussion with Chao Shi here, we should keep track of the "last committed txid" on each JournalNode. Then during any recovery operation, we can sanity-check that we aren't asked to...
http://issues.apache.org/jira/browse/HDFS-3863    Author: Todd Lipcon, 2012-09-05, 05:13
[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, 2012-09-01, 19:55
[HDFS-3872] Store block ID in block metadata header - HDFS - [issue]
...We recently had an interesting local filesystem corruption in one cluster, which caused a block and its associated metadata file to get replaced with a data/meta pair from an entirely differ...
http://issues.apache.org/jira/browse/HDFS-3872    Author: Todd Lipcon, 2012-08-30, 17:52
[HDFS-3857] Image transfer never times out on client side - HDFS - [issue]
...Currently, the code which fetches the fsimage checkpoint from the other node has no timeouts. In certain circumstances I've seen the Jetty acceptor thread die, but the kernel still accepts c...
http://issues.apache.org/jira/browse/HDFS-3857    Author: Todd Lipcon, 2012-08-28, 05:50
[HDFS-3359] DFSClient.close should close cached sockets - HDFS - [issue]
...Some applications like the TT/JT (pre-2.0) and probably the RM/NM cycle through DistributedFileSystem objects reasonably frequently. So long as they call close() it isn't a big problem, exce...
http://issues.apache.org/jira/browse/HDFS-3359    Author: Todd Lipcon, 2012-08-28, 00:29
[HDFS-3845] Fixes for edge cases in QJM recovery protocol - HDFS - [issue]
...After running the randomized tests from HDFS-3800 for several machine-weeks, we identified a few edge cases in the recovery protocol that weren't properly designed for. This JIRA is to modif...
http://issues.apache.org/jira/browse/HDFS-3845    Author: Todd Lipcon, 2012-08-27, 20:55
[HDFS-3683] Edit log replay progress indicator shows >100% complete - HDFS - [issue]
...When loading a large edit log, the NameNode prints a percentage-complete progress indicator:int percent = Math.round((float)lastAppliedTxId / numTxns * 100);        ...
http://issues.apache.org/jira/browse/HDFS-3683    Author: Todd Lipcon, 2012-08-26, 17:59
[HDFS-2987] DNA_SHUTDOWN command is never sent by the NN - HDFS - [issue]
...The DataNode has a code path to handle a DNA_SHUTDOWN command, but in fact this command has never been sent by the NN (it was introduced by HADOOP-641 in 0.8.0!)...
http://issues.apache.org/jira/browse/HDFS-2987    Author: Todd Lipcon, 2012-08-18, 11:09
[HDFS-3796] Speed up edit log tests by avoiding fsync() - HDFS - [issue]
...Our edit log tests are very slow because they incur a lot of fsyncs as they write out transactions. Since fsync() has no effect except in the case of power outages or system crashes, and we ...
http://issues.apache.org/jira/browse/HDFS-3796    Author: Todd Lipcon, 2012-08-17, 00:57
[HDFS-3800] QJM: improvements to QJM fault testing - HDFS - [issue]
...This JIRA improves TestQJMWithFaults as follows: the current implementation didn't properly unwrap exceptions thrown by the reflection-based injection method. This caused some issues in the ...
http://issues.apache.org/jira/browse/HDFS-3800    Author: Todd Lipcon, 2012-08-16, 06:19
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