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https://issues.apache.org/jira/browse/AMBARI-11552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14571883#comment-14571883
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Alejandro Fernandez commented on AMBARI-11552:
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+1 LGTM
> 2.3 stack advisor doesn't take into account HBASE-11520
> -------------------------------------------------------
>
> Key: AMBARI-11552
> URL: https://issues.apache.org/jira/browse/AMBARI-11552
> Project: Ambari
> Issue Type: Bug
> Reporter: Nick Dimiduk
> Fix For: 2.1.0
>
> Attachments: AMBARI-11552.00.patch, AMBARI-11552.patch
>
>
> Launching a HDP-2.3 RS with the HDP-2.2 stack_advisor's output on a machine
> with lots of ram results in
> {noformat}
> regionserver.HRegionServer: Failed init
> java.lang.OutOfMemoryError: Direct buffer memory
> at java.nio.Bits.reserveMemory(Bits.java:658)
> at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
> at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
> at
> org.apache.hadoop.hbase.util.ByteBufferArray.<init>(ByteBufferArray.java:65)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.ByteBufferIOEngine.<init>(ByteBufferIOEngine.java:47)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.getIOEngineFromName(BucketCache.java:309)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.<init>(BucketCache.java:219)
> at
> org.apache.hadoop.hbase.io.hfile.CacheConfig.getBucketCache(CacheConfig.java:568)
> at org.apache.hadoop.hbase.io.hfile.CacheConfig.getL2(CacheConfig.java:511)
> at
> org.apache.hadoop.hbase.io.hfile.CacheConfig.instantiateBlockCache(CacheConfig.java:591)
> at org.apache.hadoop.hbase.io.hfile.CacheConfig.<init>(CacheConfig.java:231)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.handleReportForDutyResponse(HRegionServer.java:1349)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:896)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> HBASE-11520 introduced a subtle change in the configuration, it's release
> note says
> bq. Remove "hbase.bucketcache.percentage.in.combinedcache". Simplifies config
> of block cache. If you are using this config., after this patch goes in, it
> will be ignored. The L1 LruBlockCache will be whatever hfile.block.cache.size
> is set to and the L2 BucketCache will be whatever hbase.bucketcache.size is
> set to.
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