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HBASE-27676 Scan handlers in the RPC executor should match at least o… #5074

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Mar 22, 2023
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HBASE-27676 Scan handlers in the RPC executor should match at least o… #5074

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8 changes: 5 additions & 3 deletions hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RWQueueRpcExecutor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -79,11 +79,13 @@ public RWQueueRpcExecutor(final String name, final int handlerCount, final int m
int readQueues = calcNumReaders(this.numCallQueues, callqReadShare);
int readHandlers = Math.max(readQueues, calcNumReaders(handlerCount, callqReadShare));

int scanQueues = Math.max(0, (int) Math.floor(readQueues * callqScanShare));
int scanHandlers = Math.max(0, (int) Math.floor(readHandlers * callqScanShare));
int scanQueues =
scanHandlers > 0 ? Math.max(1, (int) Math.floor(readQueues * callqScanShare)) : 0;

if ((readQueues - scanQueues) > 0) {
readQueues -= scanQueues;
if (scanQueues > 0) {
// if scanQueues > 0, the handler count of read should > 0, then we make readQueues >= 1
readQueues = Math.max(1, readQueues - scanQueues);
readHandlers -= scanHandlers;
} else {
scanQueues = 0;
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12 changes: 12 additions & 0 deletions hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRpcSchedulerFactory.java
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Expand Up @@ -67,6 +67,18 @@ public void testRWQ() {
assertTrue(rpcScheduler.getClass().equals(SimpleRpcScheduler.class));
}

@Test
public void testRWQWithoutReadShare() {
// Set some configs just to see how it changes the scheduler. Can't assert the settings had
// an effect. Just eyeball the log.
this.conf.setDouble(RWQueueRpcExecutor.CALL_QUEUE_READ_SHARE_CONF_KEY, 0);
this.conf.setDouble(RpcExecutor.CALL_QUEUE_HANDLER_FACTOR_CONF_KEY, 0.5);
this.conf.setDouble(RWQueueRpcExecutor.CALL_QUEUE_SCAN_SHARE_CONF_KEY, 0);
RpcSchedulerFactory factory = new SimpleRpcSchedulerFactory();
RpcScheduler rpcScheduler = factory.create(this.conf, null, null);
assertTrue(rpcScheduler.getClass().equals(SimpleRpcScheduler.class));
}

@Test
public void testFifo() {
RpcSchedulerFactory factory = new FifoRpcSchedulerFactory();
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