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[HBASE-9810] Global memstore size will be calculated wrongly if replaying recovered edits throws exception - HBase - [issue]
...Recently we encountered such a case in 0.94-version:Flush is triggered frequently because:DEBUG org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Flush thread woke up because memory abov...
http://issues.apache.org/jira/browse/HBASE-9810    Author: chunhui shen, 2013-12-16, 18:47
[HBASE-8163] MemStoreChunkPool: An improvement for JAVA GC when using MSLAB - HBase - [issue]
...Usage:Disable pool(default): configure "hbase.hregion.memstore.chunkpool.maxsize" as 0Enable pool: configure "hbase.hregion.memstore.chunkpool.maxsize" as a percentage of global memstore siz...
http://issues.apache.org/jira/browse/HBASE-8163    Author: chunhui shen, 2013-11-18, 18:43
[HBASE-9488] Improve performance for small scan - HBase - [issue]
...review board:https://reviews.apache.org/r/14059/Performance ImprovementTest shows about 1.5~3X improvement for small scan where limit<=50 under cache hit ratio=100%.See more performance t...
http://issues.apache.org/jira/browse/HBASE-9488    Author: chunhui shen, 2013-10-22, 07:13
[HBASE-6012] Handling RegionOpeningState for bulk assign - HBase - [issue]
...Since HBASE-5914, we using bulk assign for SSHBut in the bulk assign case if we get an ALREADY_OPENED case there is no one to clear the znode created by bulk assign. Another thing, when RS o...
http://issues.apache.org/jira/browse/HBASE-6012    Author: chunhui shen, 2013-10-15, 05:46
[HBASE-8287] TestRegionMergeTransactionOnCluster failed in trunk build #4010 - HBase - [issue]
...From the log of trunk build #4010:2013-04-04 05:45:59,396 INFO  [MASTER_TABLE_OPERATIONS-quirinus.apache.org,53514,1365054344859-0] handler.DispatchMergingRegionHandler(157): Cancel mer...
http://issues.apache.org/jira/browse/HBASE-8287    Author: chunhui shen, 2013-09-23, 20:28
[HBASE-6311] Data error after majorCompaction caused by keeping MVCC for opened scanners - HBase - [issue]
...It is a big problem we found in 0.94, and you could reproduce the problem in Trunk using the test case I uploaded.When we do compaction, we will use region.getSmallestReadPoint() to keep MVC...
http://issues.apache.org/jira/browse/HBASE-6311    Author: chunhui shen, 2013-09-18, 23:07
[HBASE-6870] HTable#coprocessorExec always scan the whole table - HBase - [issue]
...In current logic, HTable#coprocessorExec always scans the entire META table, loading it into memory and then filters the keys to return only those that fall in specified range.  The ver...
http://issues.apache.org/jira/browse/HBASE-6870    Author: chunhui shen, 2013-09-04, 22:25
[HBASE-7671] Flushing memstore again after last failure could cause data loss - HBase - [issue]
...See the following logs first:2013-01-23 18:58:38,801 INFO org.apache.hadoop.hbase.regionserver.Store: Flushed , sequenceid=9746535080, memsize=101.8m, into tmp file hdfs://dw77.kgb.sqa.cm4:9...
http://issues.apache.org/jira/browse/HBASE-7671    Author: chunhui shen, 2013-07-29, 05:23
[HBASE-8980] Assistant Store ----------- An Index Store of HRegion - HBase - [issue]
...Backgrounda.Generally, we would hope several organizations for the same data. e.g. Secondary Index sortes the data as the non-primary key.b.Now, when we scanning the data on HBase with condi...
http://issues.apache.org/jira/browse/HBASE-8980    Author: chunhui shen, 2013-07-28, 05:05
[HBASE-5672] TestLruBlockCache#testBackgroundEvictionThread fails occasionally - HBase - [issue]
...We find TestLruBlockCache#testBackgroundEvictionThread fails occasionally.I think it's a problem of the test case.Because runEviction() only do evictionThread.evict():public void evict() {&n...
http://issues.apache.org/jira/browse/HBASE-5672    Author: chunhui shen, 2013-05-31, 03:47
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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