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https://issues.apache.org/jira/browse/HBASE-18526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16115709#comment-16115709
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Lars George commented on HBASE-18526:
-------------------------------------

Pinging [~vrodionov] as per the mailing list...

> FIFOCompactionPolicy pre-check uses wrong scope
> -----------------------------------------------
>
>                 Key: HBASE-18526
>                 URL: https://issues.apache.org/jira/browse/HBASE-18526
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 1.3.1
>            Reporter: Lars George
>
> See https://issues.apache.org/jira/browse/HBASE-14468
> It adds this check to {{HMaster.checkCompactionPolicy()}}:
> {code}
> // 1. Check TTL
> if (hcd.getTimeToLive() == HColumnDescriptor.DEFAULT_TTL) {
>   message = "Default TTL is not supported for FIFO compaction";
>   throw new IOException(message);
> }
> // 2. Check min versions
> if (hcd.getMinVersions() > 0) {
>   message = "MIN_VERSION > 0 is not supported for FIFO compaction";
>   throw new IOException(message);
> }
> // 3. blocking file count
> String sbfc = htd.getConfigurationValue(HStore.BLOCKING_STOREFILES_KEY);
> if (sbfc != null) {
>   blockingFileCount = Integer.parseInt(sbfc);
> }
> if (blockingFileCount < 1000) {
>   message =
>       "blocking file count '" + HStore.BLOCKING_STOREFILES_KEY + "' "
> + blockingFileCount
>           + " is below recommended minimum of 1000";
>   throw new IOException(message);
> }
> {code}
> Why does it only check the blocking file count on the HTD level, while
> others are check on the HCD level? Doing this for example fails
> because of it:
> {noformat}
> hbase(main):008:0> create 'ttltable', { NAME => 'cf1', TTL => 300,
> CONFIGURATION => { 'hbase.hstore.defaultengine.compactionpolicy.class'
> => 'org.apache.hadoop.hbase.regionserver.compactions.FIFOCompactionPolicy',
> 'hbase.hstore.blockingStoreFiles' => 2000 } }
> ERROR: org.apache.hadoop.hbase.DoNotRetryIOException: blocking file
> count 'hbase.hstore.blockingStoreFiles' 10 is below recommended
> minimum of 1000 Set hbase.table.sanity.checks to false at conf or
> table descriptor if you want to bypass sanity checks
> at 
> org.apache.hadoop.hbase.master.HMaster.warnOrThrowExceptionForFailure(HMaster.java:1782)
> at 
> org.apache.hadoop.hbase.master.HMaster.sanityCheckTableDescriptor(HMaster.java:1663)
> at org.apache.hadoop.hbase.master.HMaster.createTable(HMaster.java:1545)
> at 
> org.apache.hadoop.hbase.master.MasterRpcServices.createTable(MasterRpcServices.java:469)
> at 
> org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java:58549)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2339)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:123)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:188)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:168)
> Caused by: java.io.IOException: blocking file count
> 'hbase.hstore.blockingStoreFiles' 10 is below recommended minimum of
> 1000
> at 
> org.apache.hadoop.hbase.master.HMaster.checkCompactionPolicy(HMaster.java:1773)
> at 
> org.apache.hadoop.hbase.master.HMaster.sanityCheckTableDescriptor(HMaster.java:1661)
> ... 7 more
> {noformat}
> The check should be performed on the column family level instead.



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