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[HBASE-11633] [0.94] port HBASE-11217 Race between SplitLogManager task creation + TimeoutMonitor - HBase - [issue]
...See HBASE-11217. This can lead to massive data loss as explained there....
http://issues.apache.org/jira/browse/HBASE-11633    Author: Lars Hofhansl, 2014-08-09, 05:40
[HBASE-11695] PeriodicFlusher and WakeFrequency issues - HBase - [issue]
...We just ran into a flush storm caused by the PeriodicFlusher.Many memstore became eligible for flushing at exactly the same time, the effect we've seen is that the exact same region was flus...
http://issues.apache.org/jira/browse/HBASE-11695    Author: Lars Hofhansl, 2014-08-08, 07:28
[HBASE-9005] Improve documentation around KEEP_DELETED_CELLS, time range scans, and delete markers - HBase - [issue]
...Without KEEP_DELETED_CELLS all timerange queries are broken if their range covers a delete marker.As some internal discussions with colleagues showed, this feature is not well understand and...
http://issues.apache.org/jira/browse/HBASE-9005    Author: Lars Hofhansl, 2014-08-07, 22:20
[HBASE-11667] Comment ClientScanner logic for NSREs. - HBase - [issue]
...We ran into an issue with Phoenix where a RegionObserver coprocessor intercepts a scan and returns an aggregate (in this case a count) with a fake row key. It turns out this does not work wh...
http://issues.apache.org/jira/browse/HBASE-11667    Author: Lars Hofhansl, 2014-08-07, 01:24
[HBASE-11641] TestDistributedLogSplitting.testMasterStartsUpWithLogSplittingWork fails frequently - HBase - [issue]
...3 out of last four run of my RC jenkins build failed in this test.Might be related to HBASE-11041 too....
http://issues.apache.org/jira/browse/HBASE-11641    Author: Lars Hofhansl, 2014-08-05, 22:31
[HBASE-11143] Improve replication metrics - HBase - [issue]
...We are trying to report on replication lag and find that there is no good single metric to do that.ageOfLastShippedOp is close, but unfortunately it is increased even when there is nothing t...
http://issues.apache.org/jira/browse/HBASE-11143    Author: Lars Hofhansl, 2014-08-05, 04:36
[HBASE-11652] Port HBASE-3270 and HBASE-11650 to 0.94 - create cluster id and version file in a tmp location and move it into place - HBase - [issue]
...See HBASE-3270 and HBASE-11650...
http://issues.apache.org/jira/browse/HBASE-11652    Author: Lars Hofhansl, 2014-08-03, 05:48
[HBASE-9272] A parallel, unordered scanner - HBase - [issue]
...The contract of ClientScanner is to return rows in sort order. That limits the order in which region can be scanned.I propose a simple ParallelScanner that does not have this requirement and...
http://issues.apache.org/jira/browse/HBASE-9272    Author: Lars Hofhansl, 2014-06-23, 12:42
[HBASE-11351] Experiments with OffHeap memstores - HBase - [issue]
...I have been experimenting with offheap memstores using an offheap BTree implementation of ConcurrentMap provided by MapDB (www.mapdb.org)So far I hooked this up in an experimental way with i...
http://issues.apache.org/jira/browse/HBASE-11351    Author: Lars Hofhansl, 2014-06-15, 04:58
[HBASE-8362] Possible MultiGet optimization - HBase - [issue]
...Currently MultiGets are executed on a RegionServer in a single thread in a loop that handles each Get separately (opening a scanner, seeking, etc).It seems we could optimize this (per region...
http://issues.apache.org/jira/browse/HBASE-8362    Author: Lars Hofhansl, 2014-06-13, 17:16
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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