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[HBASE-13382] IntegrationTestBigLinkedList should use SecureRandom - HBase - [issue]
...IntegrationTestBigLinkedList currently uses java.util.Random to generate its random keys. The keys are 128 bits long, but we generate them using Random.nextBytes(). The Random implementation...
http://issues.apache.org/jira/browse/HBASE-13382    Author: Todd Lipcon, 2015-05-05, 06:02
[HBASE-5980] Scanner responses from RS should include metrics on rows/KVs filtered - HBase - [issue]
...Currently it's difficult to know, when issuing a filter, what percentage of rows were skipped by that filter. We should expose some basic counters back to the client scanner object. For exam...
http://issues.apache.org/jira/browse/HBASE-5980    Author: Todd Lipcon, 2015-04-30, 01:34
[HBASE-3455] Heap fragmentation in region server - HBase - [issue]
...Stop-the-world GC pauses have long been a problem in HBase. "Concurrent mode failures" can usually be tuned around by setting the initiating occupancy fraction low, but eventually the heap b...
http://issues.apache.org/jira/browse/HBASE-3455    Author: Todd Lipcon, 2015-04-24, 07:36
[HBASE-5978] Scanner next() calls should return after a configurable time threshold regardless of number of accumulated rows - HBase - [issue]
...Currently if you pass a very restrictive filter to a scanner, along with a high caching value, you will end up causing RPC timeouts, lease exceptions, etc. Although this is a poor configurat...
http://issues.apache.org/jira/browse/HBASE-5978    Author: Todd Lipcon, 2015-04-08, 20:26
[HBASE-5238] Add a log4j category for all edits to META/ROOT - HBase - [issue]
...Occasionally we run into bugs that have corrected META and written some bad data to META/ROOT but it's difficult to understand the order in which things happened. One option is to dump the H...
http://issues.apache.org/jira/browse/HBASE-5238    Author: Todd Lipcon, 2015-03-26, 01:24
Re: Client-Server wire compatibility? - HBase - [mail # dev]
...If you add a negotiation phase, I'd recommend doing it in terms of alist rather than a version number. That makes it mucheasier to backport new features across branches without being forced ...
   Author: Todd Lipcon, 2015-03-06, 00:20
[HBASE-3243] Disable Table closed region on wrong host - HBase - [issue]
...I ran some YCSB benchmarks which resulted in about 150 regions worth of data overnight. Then I disabled the table, and the master for some reason closed one region on the wrong server. The s...
http://issues.apache.org/jira/browse/HBASE-3243    Author: Todd Lipcon, 2015-01-13, 00:47
[HBASE-3350] Disabling table while splitting leaves regions in transition - HBase - [issue]
...With my "crazy conf" that causes tons of splits, I had a 2000 region table, which I disabled while inserting data (similar to HBASE-3345). This time I didn't get NPE, but I ended up with 68 ...
http://issues.apache.org/jira/browse/HBASE-3350    Author: Todd Lipcon, 2014-12-29, 19:48
[HBASE-3472] New import/export jobs based on HFiles - HBase - [issue]
...Not sure if I'll have time to work on this, but the old sequencefile-based import/export are not as efficient as one based on HFiles would be. Idea is: hbase exporthf: TableInputFormat ->...
http://issues.apache.org/jira/browse/HBASE-3472    Author: Todd Lipcon, 2014-12-29, 18:57
[HBASE-4807] Use of Serializable in IPC makes an unnecessary copy - HBase - [issue]
...This code path isn't used much, but in HbaseObjectWritable, the code to serialize and deserialize Serializables makes an unnecessary copy through ByteArrayOutputStream.toByteArray. Instead w...
http://issues.apache.org/jira/browse/HBASE-4807    Author: Todd Lipcon, 2014-12-24, 20:08
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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