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[HDFS-8965] Harden edit log reading code against out of memory errors - HDFS - [issue]
...We should harden the edit log reading code against out of memory errors.  Now that each op has a length prefix and a checksum, we can validate the checksum before trying to load the Op ...
http://issues.apache.org/jira/browse/HDFS-8965    Author: Colin Patrick McCabe, 2015-09-01, 06:13
[HDFS-4957] NameNode failover should not fail because a DNS entry for a quorum node cannot be resolved - HDFS - [issue]
...When a StandbyNameNode is becoming active, we should not bail out because a DNS entry for a quorum node cannot be resolved.  Currently it does fail in this scenario, with a message like...
http://issues.apache.org/jira/browse/HDFS-4957    Author: Colin Patrick McCabe, 2015-08-31, 18:44
[HDFS-8924] Add pluggable interface for reading replicas in DFSClient - HDFS - [issue]
...We should add a pluggable interface for reading replicas in the DFSClient.  This could be used to implement short-circuit reads on systems without file descriptors, or for other optimiz...
http://issues.apache.org/jira/browse/HDFS-8924    Author: Colin Patrick McCabe, 2015-08-22, 05:56
[HDFS-5021] FSShell delete and FSShell rename should operate on symlinks, not their targets - HDFS - [issue]
...Currently FSShell delete and FSShell rename don't behave as expected on symlinks.  If you have /a/b/c as a link to /a/b/d, and you try to delete /a/b/c, the target /a/b/d will be delete...
http://issues.apache.org/jira/browse/HDFS-5021    Author: Colin Patrick McCabe, 2015-08-17, 17:11
[HDFS-4817] make HDFS advisory caching configurable on a per-file basis - HDFS - [issue]
...HADOOP-7753 and related JIRAs introduced some performance optimizations for the DataNode.  One of them was readahead.  When readahead is enabled, the DataNode starts reading the ne...
http://issues.apache.org/jira/browse/HDFS-4817    Author: Colin Patrick McCabe, 2015-07-16, 09:48
[HDFS-5546] race condition crashes "hadoop ls -R" when directories are moved/removed - HDFS - [issue]
...This seems to be a rare race condition where we have a sequence of events like this:1. org.apache.hadoop.shell.Ls calls DFS#getFileStatus on directory D.2. someone deletes or moves directory...
http://issues.apache.org/jira/browse/HDFS-5546    Author: Colin Patrick McCabe, 2015-07-12, 02:47
[HDFS-8305] HDFS INotify: the destination field of RenameOp should always end with the file name - HDFS - [issue]
...HDFS INotify: the destination field of RenameOp should always end with the file name rather than sometimes being a directory name.  Previously, in some cases when using the old rename, ...
http://issues.apache.org/jira/browse/HDFS-8305    Author: Colin Patrick McCabe, 2015-07-07, 22:47
[HDFS-5511] improve CacheManipulator interface to allow better unit testing - HDFS - [issue]
...The CacheManipulator interface has been helpful in allowing us to stub out mlock in cases where we don't want to test it.  We should move  the getMemlockLimit and getOperatingSyste...
http://issues.apache.org/jira/browse/HDFS-5511    Author: Colin Patrick McCabe, 2015-06-30, 08:25
[HDFS-5366] recaching improvements - HDFS - [issue]
...There are a few things about our HDFS-4949 recaching strategy that could be improved. We should monitor the DN's maximum and current mlock'ed memory consumption levels, so that we don't ask ...
http://issues.apache.org/jira/browse/HDFS-5366    Author: Colin Patrick McCabe, 2015-06-30, 08:25
[HDFS-5431] support cachepool-based limit management in path-based caching - HDFS - [issue]
...We should support cachepool-based limit management in path-based caching....
http://issues.apache.org/jira/browse/HDFS-5431    Author: Colin Patrick McCabe, 2015-06-30, 08:25
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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