HBASE-27798: Client side should back off based on wait interval in RpcThrottlingException #5275
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.hadoop.hbase.client.backoff; | ||
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| import java.util.OptionalLong; | ||
| import java.util.concurrent.TimeUnit; | ||
| import org.apache.hadoop.hbase.HBaseServerException; | ||
| import org.apache.hadoop.hbase.quotas.RpcThrottlingException; | ||
| import org.apache.yetus.audience.InterfaceAudience; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| @InterfaceAudience.Private | ||
| public class HBaseServerExceptionPauseManager { | ||
| private static final Logger LOG = LoggerFactory.getLogger(HBaseServerExceptionPauseManager.class); | ||
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| private final long pauseNs; | ||
| private final long pauseNsForServerOverloaded; | ||
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| public HBaseServerExceptionPauseManager(long pauseNs, long pauseNsForServerOverloaded) { | ||
| this.pauseNs = pauseNs; | ||
| this.pauseNsForServerOverloaded = pauseNsForServerOverloaded; | ||
| } | ||
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| public OptionalLong getPauseNsFromException(Throwable error, long remainingTimeNs) { | ||
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| long expectedSleepNs; | ||
| if (error instanceof RpcThrottlingException) { | ||
| RpcThrottlingException rpcThrottlingException = (RpcThrottlingException) error; | ||
| expectedSleepNs = TimeUnit.MILLISECONDS.toNanos(rpcThrottlingException.getWaitInterval()); | ||
| if (expectedSleepNs > remainingTimeNs) { | ||
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| return OptionalLong.empty(); | ||
| } | ||
| if (LOG.isDebugEnabled()) { | ||
| LOG.debug("Sleeping for {}ms after catching RpcThrottlingException", expectedSleepNs, | ||
| rpcThrottlingException); | ||
| } | ||
| } else { | ||
| expectedSleepNs = | ||
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| HBaseServerException.isServerOverloaded(error) ? pauseNsForServerOverloaded : pauseNs; | ||
| } | ||
| return OptionalLong.of(expectedSleepNs); | ||
| } | ||
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| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.hadoop.hbase.client.backoff; | ||
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| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.assertFalse; | ||
| import static org.junit.Assert.assertTrue; | ||
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| import java.util.OptionalLong; | ||
| import java.util.concurrent.TimeUnit; | ||
| import org.apache.hadoop.hbase.HBaseClassTestRule; | ||
| import org.apache.hadoop.hbase.HBaseServerException; | ||
| import org.apache.hadoop.hbase.quotas.RpcThrottlingException; | ||
| import org.apache.hadoop.hbase.testclassification.ClientTests; | ||
| import org.apache.hadoop.hbase.testclassification.SmallTests; | ||
| import org.junit.ClassRule; | ||
| import org.junit.Test; | ||
| import org.junit.experimental.categories.Category; | ||
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| @Category({ ClientTests.class, SmallTests.class }) | ||
| public class TestHBaseServerExceptionPauseManager { | ||
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| private static final long WAIT_INTERVAL_MILLIS = 1L; | ||
| private static final long WAIT_INTERVAL_NANOS = | ||
| TimeUnit.MILLISECONDS.toNanos(WAIT_INTERVAL_MILLIS); | ||
| private static final long PAUSE_NANOS_FOR_SERVER_OVERLOADED = WAIT_INTERVAL_NANOS * 3; | ||
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| private static final long PAUSE_NANOS = WAIT_INTERVAL_NANOS * 2; | ||
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| private final RpcThrottlingException RPC_THROTTLING_EXCEPTION = new RpcThrottlingException( | ||
| RpcThrottlingException.Type.NumRequestsExceeded, WAIT_INTERVAL_MILLIS, "doot"); | ||
| private final Throwable OTHER_EXCEPTION = new RuntimeException(""); | ||
| private final HBaseServerException SERVER_OVERLOADED_EXCEPTION = new HBaseServerException(true); | ||
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| private final HBaseServerExceptionPauseManager pauseManager = | ||
| new HBaseServerExceptionPauseManager(PAUSE_NANOS, PAUSE_NANOS_FOR_SERVER_OVERLOADED); | ||
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| @ClassRule | ||
| public static final HBaseClassTestRule CLASS_RULE = | ||
| HBaseClassTestRule.forClass(TestHBaseServerExceptionPauseManager.class); | ||
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| @Test | ||
| public void itSupportsRpcThrottlingNanos() { | ||
| OptionalLong pauseNanos = | ||
| pauseManager.getPauseNsFromException(RPC_THROTTLING_EXCEPTION, Long.MAX_VALUE); | ||
| assertTrue(pauseNanos.isPresent()); | ||
| assertEquals(pauseNanos.getAsLong(), WAIT_INTERVAL_NANOS); | ||
| } | ||
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| @Test | ||
| public void itSupportsServerOverloadedExceptionNanos() { | ||
| OptionalLong pauseNanos = | ||
| pauseManager.getPauseNsFromException(SERVER_OVERLOADED_EXCEPTION, Long.MAX_VALUE); | ||
| assertTrue(pauseNanos.isPresent()); | ||
| assertEquals(pauseNanos.getAsLong(), PAUSE_NANOS_FOR_SERVER_OVERLOADED); | ||
| } | ||
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| @Test | ||
| public void itSupportsOtherExceptionNanos() { | ||
| OptionalLong pauseNanos = pauseManager.getPauseNsFromException(OTHER_EXCEPTION, Long.MAX_VALUE); | ||
| assertTrue(pauseNanos.isPresent()); | ||
| assertEquals(pauseNanos.getAsLong(), PAUSE_NANOS); | ||
| } | ||
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| @Test | ||
| public void itThrottledTimeoutFastFail() { | ||
| OptionalLong pauseNanos = pauseManager.getPauseNsFromException(RPC_THROTTLING_EXCEPTION, 0L); | ||
| assertFalse(pauseNanos.isPresent()); | ||
| } | ||
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| } |
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Do we need to test this here?
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I believe this logic is covered by existing tests in
TestAsyncClientPauseForServerOverloaded