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[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
[HDFS-3797] QJM: add segment txid as a parameter to journal() RPC - HDFS - [issue]
...During fault testing of QJM, I saw the following issue:1) NN sends txn 5 to JN2) NN gets partitioned from JN while JN remains up. The next two RPCs are missed while the partition has happene...
http://issues.apache.org/jira/browse/HDFS-3797    Author: Todd Lipcon, 2012-08-16, 06:14
[HDFS-3190] Simple refactors in existing NN code to assist QuorumJournalManager extension - HDFS - [issue]
...This JIRA is for some simple refactors in the NN: refactor the code which writes the seen_txid file in NNStorage into a new "LongContainingFile" utility class. This is useful for the Journal...
http://issues.apache.org/jira/browse/HDFS-3190    Author: Todd Lipcon, 2012-08-16, 00:20
[HDFS-1075] Separately configure connect timeouts from read timeouts in data path - HDFS - [issue]
...The timeout configurations in the write pipeline overload the read timeout to also include a connect timeout. In my experience, if a node is down it can take many seconds to get back an exce...
http://issues.apache.org/jira/browse/HDFS-1075    Author: Todd Lipcon, 2012-08-15, 19:40
[HDFS-3799] QJM: handle empty log segments during recovery - HDFS - [issue]
...One of the cases not yet handled in the QJM branch is the one where either the writer or the journal node crashes after startLogSegment() but before it has written its first transaction to t...
http://issues.apache.org/jira/browse/HDFS-3799    Author: Todd Lipcon, 2012-08-15, 11:57
[HDFS-3798] Avoid throwing NPE when finalizeSegment() is called on invalid segment - HDFS - [issue]
...Currently, if the client calls finalizeLogSegment() on a segment which doesn't exist on the JournalNode side, it throws an NPE. Instead it should throw a more intelligible exception....
http://issues.apache.org/jira/browse/HDFS-3798    Author: Todd Lipcon, 2012-08-15, 11:55
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