[jira] [Created] (HBASE-14252) RegionServers fail to start when setting hbase.ipc.server.callqueue.scan.ratio=0.

[Toshihiro Suzuki (JIRA)]

Toshihiro Suzuki created HBASE-14252:
----------------------------------------

             Summary: RegionServers fail to start when setting 
hbase.ipc.server.callqueue.scan.ratio=0.
                 Key: HBASE-14252
                 URL: https://issues.apache.org/jira/browse/HBASE-14252
             Project: HBase
          Issue Type: Bug
          Components: regionserver
         Environment: hbase-0.98.6-cdh5.3.1
            Reporter: Toshihiro Suzuki


I set the following configuration in hbase-site.xml.

{code}
<property>
  <name>hbase.ipc.server.callqueue.read.ratio</name>
  <value>0.5</value>
</property>
<property>
  <name>hbase.ipc.server.callqueue.scan.ratio</name>
  <value>0</value>
<property>
{code}

Then, the RegionServer failed to start and I saw the following log:

{code}
2015-08-19 14:30:19,561 ERROR 
org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine: Region server 
exiting
java.lang.RuntimeException: Failed construction of Regionserver: class 
org.apache.hadoop.hbase.regionserver.HRegionServer
        at 
org.apache.hadoop.hbase.regionserver.HRegionServer.constructRegionServer(HRegionServer.java:2457)
        at 
org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.start(HRegionServerCommandLine.java:61)
        at 
org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.run(HRegionServerCommandLine.java:85)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at 
org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)
        at 
org.apache.hadoop.hbase.regionserver.HRegionServer.main(HRegionServer.java:2472)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at 
org.apache.hadoop.hbase.regionserver.HRegionServer.constructRegionServer(HRegionServer.java:2455)
        ... 5 more
Caused by: java.lang.IllegalArgumentException: Queue size is <= 0, must be at 
least 1
        at 
com.google.common.base.Preconditions.checkArgument(Preconditions.java:92)
        at 
org.apache.hadoop.hbase.ipc.RpcExecutor.getBalancer(RpcExecutor.java:139)
        at 
org.apache.hadoop.hbase.ipc.RWQueueRpcExecutor.<init>(RWQueueRpcExecutor.java:121)
        at 
org.apache.hadoop.hbase.ipc.RWQueueRpcExecutor.<init>(RWQueueRpcExecutor.java:83)
        at 
org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.<init>(SimpleRpcScheduler.java:129)
        at 
org.apache.hadoop.hbase.regionserver.SimpleRpcSchedulerFactory.create(SimpleRpcSchedulerFactory.java:36)
        at 
org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:610)
        ... 10 more
{code}

The doc of "hbase.ipc.server.callqueue.scan.ratio" says "A value of 0 or 1 
indicate to use the same set of queues for gets and scans.".
I think that there is a bug in validation.




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