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[HBASE-4403] Adopt interface stability/audience classifications from Hadoop - HBase - [issue]
...As HBase gets more widely used, we need to be more explicit about which APIs are stable and not expected to break between versions, which APIs are still evolving, etc. We also have many publ...
http://issues.apache.org/jira/browse/HBASE-4403    Author: Todd Lipcon, 2013-09-11, 01:40
[HBASE-3939] Some crossports of Hadoop IPC fixes - HBase - [issue]
...A few fixes from Hadoop IPC that we should probably cross-port into our copy: HADOOP-7227: remove the protocol version check at call time HADOOP-7146: fix a socket leak in server HADOOP-7121...
http://issues.apache.org/jira/browse/HBASE-3939    Author: Todd Lipcon, 2013-08-19, 23:46
[HBASE-4361] Certain filter expressions fail in the shell - HBase - [issue]
...Running the following in the shell hangs and then fails:scan 't1', { FILTER => "SingleColumnValueFilter(">", '1', 'f1', 'col_a')" }The error seems to be: org.jruby.exceptions.RaiseExce...
http://issues.apache.org/jira/browse/HBASE-4361    Author: Todd Lipcon, 2013-08-12, 19:43
[HBASE-2231] Compaction events should be written to HLog - HBase - [issue]
...The sequence for a compaction should look like this: Compact region to "new" files Write a "Compacted Region" entry to the HLog Delete "old" filesThis deals with a case where the RS has paus...
http://issues.apache.org/jira/browse/HBASE-2231    Author: Todd Lipcon, 2013-05-24, 10:29
[HBASE-2332] Remove client-exposed row locks from region server - HBase - [issue]
...Discussion in HBASE-2294 has surfaced that the client-exposed row lock feature in the HBase API may not be scalable/necessary. Additionally there are some benefits we can reap by removing th...
http://issues.apache.org/jira/browse/HBASE-2332    Author: Todd Lipcon, 2013-05-14, 03:22
[HBASE-5912] org.apache.hadoop.hbase.ipc.ProtocolSignature.getFingerprint takes significant CPU - HBase - [issue]
...I ran oprofile on a YCSB client and found that a large percentage of the CPU time was going to this function:51991     0.4913  25361.jo           &nbs...
http://issues.apache.org/jira/browse/HBASE-5912    Author: Todd Lipcon, 2013-05-05, 00:40
[HBASE-3457] Auto-tune some GC settings - HBase - [issue]
...The settings we ship with aren't really optimal for an actual deployment. We can take a look at some things like /proc/cpuinfo and figure out whether to enable parallel GC, turn off CMSIncre...
http://issues.apache.org/jira/browse/HBASE-3457    Author: Todd Lipcon, 2013-05-04, 00:37
[HBASE-4324] Single unassigned directory is very slow when there are many unassigned nodes - HBase - [issue]
...Because we use a single znode for /unassigned, and we re-list it every time its contents change, assignment speed per region is O(number of unassigned regions) rather than O(1). Every time s...
http://issues.apache.org/jira/browse/HBASE-4324    Author: Todd Lipcon, 2013-05-03, 20:42
[HBASE-4392] Add metrics for read/write throughput (#cells, #bytes) - HBase - [issue]
...Most of our metrics are currently based on RPC count. This is an inaccurate metric since some RPCs can be much more heavy weight than others. We should maintain our current metrics but also ...
http://issues.apache.org/jira/browse/HBASE-4392    Author: Todd Lipcon, 2013-04-24, 00:51
[HBASE-4246] Cluster with too many regions cannot withstand some master failover scenarios - HBase - [issue]
...We ran into the following sequence of events: master startup failed after only ROOT had been assigned (for another reason) restarted the master without restarting other servers. Since there ...
http://issues.apache.org/jira/browse/HBASE-4246    Author: Todd Lipcon, 2013-04-24, 00:48
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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