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[HDFS-3726] QJM: if a logger misses an RPC, don't retry that logger until next segment - HDFS - [issue]
...Currently, if a logger misses an RPC in the middle of a log segment, or misses the startLogSegment RPC (eg it was down or network was disconnected during that time period), then it will thro...
http://issues.apache.org/jira/browse/HDFS-3726    Author: Todd Lipcon, 2012-09-06, 18:00
[HDFS-3891] QJM: SBN fails if selectInputStreams throws RTE - HDFS - [issue]
...Currently, QJM's selectInputStream method throws an RTE if a quorum cannot be reached. This propagates into the Standby Node and causes the whole node to crash. It should handle this error a...
http://issues.apache.org/jira/browse/HDFS-3891    Author: Todd Lipcon, 2012-09-06, 17:32
[HDFS-3867] QJM: Support rolling restart of JNs - HDFS - [issue]
...In order to perform upgrades or other maintenance, it is useful to be able to perform a rolling restart of the journal nodes while the NameNode is active.Currently, this does not work, becau...
http://issues.apache.org/jira/browse/HDFS-3867    Author: Todd Lipcon, 2012-09-06, 01:19
[HDFS-3876] NN should not RPC to self to find trash defaults (causes deadlock) - HDFS - [issue]
...When transitioning a SBN to active, I ran into the following situation: the TrashPolicy first gets loaded by an IPC Server Handler thread. The initialize function then tries to make an RPC t...
http://issues.apache.org/jira/browse/HDFS-3876    Author: Todd Lipcon, 2012-09-05, 19:31
[HDFS-3870] QJM: add metrics to JournalNode - HDFS - [issue]
...The JournalNode should expose some basic metrics through the usual interface. In particular: the writer epoch, accepted epoch, the last written transaction ID and last committed txid (which ...
http://issues.apache.org/jira/browse/HDFS-3870    Author: Todd Lipcon, 2012-09-05, 05:31
[HDFS-3884] QJM: Journal format() should reset cached values - HDFS - [issue]
...Simple bug in the JournalNode: it caches certain values (eg accepted epoch) in memory, and the cached values aren't reset when the journal is formatted. So, after a format, further calls to ...
http://issues.apache.org/jira/browse/HDFS-3884    Author: Todd Lipcon, 2012-09-05, 05:29
[HDFS-3869] QJM: expose non-file journal manager details in web UI - HDFS - [issue]
...Currently, the NN web UI only contains NN storage directories on local disk. It should also include details about any non-file JournalManagers in use.This JIRA targets the QJM branch, but wi...
http://issues.apache.org/jira/browse/HDFS-3869    Author: Todd Lipcon, 2012-09-05, 05:16
[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-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
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