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HBASE-16815 Low scan ratio in RPC queue tuning triggers divide by zero exception 

Signed-off-by: Matteo Bertozzi <matteo.bertozzi@cloudera.com>
This commit is contained in:
Guanghao Zhang 2016-10-14 18:29:25 +08:00 committed by Matteo Bertozzi
parent 4983c742e0
commit 6415137574
1 changed files with 8 additions and 7 deletions
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15
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RWQueueRpcExecutor.java
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@ -146,17 +146,16 @@ public class RWQueueRpcExecutor extends RpcExecutor {
this.scanBalancer = numScanQueues > 0 ? getBalancer(numScanQueues) : null;
queues = new ArrayList<BlockingQueue<CallRunner>>(numWriteQueues + numReadQueues + numScanQueues);
LOG.debug(name + " writeQueues=" + numWriteQueues + " writeHandlers=" + writeHandlersCount +
" readQueues=" + numReadQueues + " readHandlers=" + readHandlersCount +
((numScanQueues == 0) ? "" : " scanQueues=" + numScanQueues +
" scanHandlers=" + scanHandlersCount));
LOG.info(name + " writeQueues=" + numWriteQueues + " writeHandlers=" + writeHandlersCount
+ " readQueues=" + numReadQueues + " readHandlers=" + readHandlersCount + " scanQueues="
+ numScanQueues + " scanHandlers=" + scanHandlersCount);
if (writeQueueInitArgs.length > 0) {
currentQueueLimit = (int) writeQueueInitArgs[0];
writeQueueInitArgs[0] = Math.max((int) writeQueueInitArgs[0],
DEFAULT_CALL_QUEUE_SIZE_HARD_LIMIT);
}
for (int i = 0; i < numWriteQueues; ++i) {
queues.add((BlockingQueue<CallRunner>)
ReflectionUtils.newInstance(writeQueueClass, writeQueueInitArgs));
}
@ -176,8 +175,10 @@ public class RWQueueRpcExecutor extends RpcExecutor {
protected void startHandlers(final int port) {
startHandlers(".write", writeHandlersCount, queues, 0, numWriteQueues, port);
startHandlers(".read", readHandlersCount, queues, numWriteQueues, numReadQueues, port);
startHandlers(".scan", scanHandlersCount, queues,
numWriteQueues + numReadQueues, numScanQueues, port);
if (numScanQueues > 0) {
startHandlers(".scan", scanHandlersCount, queues, numWriteQueues + numReadQueues,
numScanQueues, port);
}
}
@Override