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[HDFS-496] Use PureJavaCrc32 in HDFS - HDFS - [issue]
...Common now has a pure java CRC32 implementation which is more efficient than java.util.zip.CRC32. This issue is to make use of it....
http://issues.apache.org/jira/browse/HDFS-496    Author: Todd Lipcon, 2013-04-03, 00:59
Re: Exception with QJM HDFS HA - HDFS - [mail # dev]
...This looks like a bug with the new inode ID code in trunk, rather than a bug with QJM or HA.  Suresh/Brandon, any thoughts?  -Todd  On Sun, Mar 31, 2013 at 6:43 PM, Azuryy Yu ...
   Author: Todd Lipcon, 2013-04-01, 05:10
[HDFS-4618] default for checkpoint txn interval is too low - HDFS - [issue]
...The default checkpoint interval is currently set to 40k transactions. That's way too low (I don't know what idiot set it to that.. oh wait, it was me...)The old default in 1.0 is 64MB. Assum...
http://issues.apache.org/jira/browse/HDFS-4618    Author: Todd Lipcon, 2013-03-29, 14:05
[HDFS-4621] additional logging to help diagnose slow QJM logSync - HDFS - [issue]
...I've been working on diagnosing an issue with a cluster which is seeing slow logSync calls occasionally to QJM. Adding a few more pieces of logging would help this: in the warning messages o...
http://issues.apache.org/jira/browse/HDFS-4621    Author: Todd Lipcon, 2013-03-29, 14:05
[HDFS-4638] TransferFsImage should take Configuration as parameter - HDFS - [issue]
...TransferFsImage currently creates a new HdfsConfiguration object, rather than taking one passed in. This means that using dfsadmin -fetchImage, you can't pass a different timeout on the comm...
http://issues.apache.org/jira/browse/HDFS-4638    Author: Todd Lipcon, 2013-03-28, 23:51
[HDFS-4617] warning while purging logs with QJM enabled - HDFS - [issue]
...HDFS-2946 changed the way that edit log purging is calculated, such that it calls selectInputStreams() with an arbitrary transaction ID calculated relative to the current one. The JournalNod...
http://issues.apache.org/jira/browse/HDFS-4617    Author: Todd Lipcon, 2013-03-28, 04:43
[HDFS-2554] Add separate metrics for missing blocks with desired replication level 1 - HDFS - [issue]
...Some users use replication level set to 1 for datasets which are unimportant and can be lost with no worry (eg the output of terasort tests). But other data on the cluster is important and s...
http://issues.apache.org/jira/browse/HDFS-2554    Author: Todd Lipcon, 2013-03-19, 18:53
[HDFS-4380] Opening a file for read before writer writes a block causes NPE - HDFS - [issue]
...JD Cryans found this issue: it seems like, if you open a file for read immediately after it's been created by the writer, after a block has been allocated, but before the block is created on...
http://issues.apache.org/jira/browse/HDFS-4380    Author: Todd Lipcon, 2013-03-13, 22:48
[HDFS-4304] Make FSEditLogOp.MAX_OP_SIZE configurable - HDFS - [issue]
...Today we ran into an issue where a NN had logged a very large op, greater than the 1.5MB MAX_OP_SIZE constant. In order to successfully load the edits, we had to patch with a larger constant...
http://issues.apache.org/jira/browse/HDFS-4304    Author: Todd Lipcon, 2013-02-23, 14:05
[HDFS-3874] Exception when client reports bad checksum to NN - HDFS - [issue]
...We see the following exception in our logs on a cluster:2012-08-27 16:34:30,400 INFO org.apache.hadoop.hdfs.StateChange: *DIR* NameNode.reportBadBlocks2012-08-27 16:34:30,400 ERROR org.apach...
http://issues.apache.org/jira/browse/HDFS-3874    Author: Todd Lipcon, 2013-01-28, 18:41
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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