Apache9 commented on code in PR #5447: URL: https://github.com/apache/hbase/pull/5447#discussion_r1344020854
########## hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerRejectDuringAbort.java: ########## @@ -0,0 +1,259 @@ +/* + * 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.regionserver; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; + +import java.io.IOException; +import java.util.Optional; +import java.util.concurrent.atomic.AtomicReference; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HBaseClassTestRule; +import org.apache.hadoop.hbase.HBaseTestingUtil; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.HRegionLocation; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.StartTestingClusterOption; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder; +import org.apache.hadoop.hbase.client.Connection; +import org.apache.hadoop.hbase.client.ConnectionFactory; +import org.apache.hadoop.hbase.client.Put; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.RetriesExhaustedException; +import org.apache.hadoop.hbase.client.Table; +import org.apache.hadoop.hbase.client.TableDescriptor; +import org.apache.hadoop.hbase.client.TableDescriptorBuilder; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.hadoop.hbase.coprocessor.RegionObserver; +import org.apache.hadoop.hbase.ipc.CallRunner; +import org.apache.hadoop.hbase.ipc.PluggableBlockingQueue; +import org.apache.hadoop.hbase.ipc.PriorityFunction; +import org.apache.hadoop.hbase.ipc.TestPluggableQueueImpl; +import org.apache.hadoop.hbase.testclassification.MediumTests; +import org.apache.hadoop.hbase.testclassification.RegionServerTests; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.hbase.util.JVMClusterUtil; +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.ClassRule; +import org.junit.Test; +import org.junit.experimental.categories.Category; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@Category({ RegionServerTests.class, MediumTests.class }) +public class TestRegionServerRejectDuringAbort { + + @ClassRule + public static final HBaseClassTestRule CLASS_RULE = + HBaseClassTestRule.forClass(TestRegionServerAbortTimeout.class); + + private static final Logger LOG = LoggerFactory.getLogger(TestRegionServerAbortTimeout.class); + + private static final HBaseTestingUtil UTIL = new HBaseTestingUtil(); + + private static TableName TABLE_NAME = TableName.valueOf("RSRejectOnAbort"); + + private static byte[] CF = Bytes.toBytes("cf"); + + private static final int REGIONS_NUM = 5; + + private static final AtomicReference<Exception> THROWN_EXCEPTION = new AtomicReference<>(null); + + private static volatile boolean shouldThrowTooBig = false; + + @BeforeClass + public static void setUp() throws Exception { + // Will schedule a abort timeout task after SLEEP_TIME_WHEN_CLOSE_REGION ms + UTIL.getConfiguration().set("hbase.ipc.server.callqueue.type", "pluggable"); + UTIL.getConfiguration().setClass("hbase.ipc.server.callqueue.pluggable.queue.class.name", + CallQueueTooBigThrowingQueue.class, PluggableBlockingQueue.class); + StartTestingClusterOption option = + StartTestingClusterOption.builder().numRegionServers(2).build(); + UTIL.startMiniCluster(option); + TableDescriptor td = TableDescriptorBuilder.newBuilder(TABLE_NAME) + .setCoprocessor(SleepWhenCloseCoprocessor.class.getName()) + .setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(CF).build()).build(); + UTIL.getAdmin().createTable(td, Bytes.toBytes("0"), Bytes.toBytes("9"), REGIONS_NUM); + } + + public static final class CallQueueTooBigThrowingQueue extends TestPluggableQueueImpl { + + public CallQueueTooBigThrowingQueue(int maxQueueLength, PriorityFunction priority, + Configuration conf) { + super(maxQueueLength, priority, conf); + } + + @Override + public boolean offer(CallRunner callRunner) { + if (shouldThrowTooBig && callRunner.getRpcCall().getRequestAttribute("test") != null) { + return false; + } + return super.offer(callRunner); + } + } + + @AfterClass + public static void tearDown() throws Exception { + UTIL.shutdownMiniCluster(); + } + + /** + * Tests that the logic in ServerRpcConnection works such that if the server is aborted, it short + * circuits any other logic. This means we no longer even attempt to enqueue the request onto the + * call queue. We verify this by using a special call queue which we can trigger to always return + * CallQueueTooBigException. If the logic works, despite forcing those exceptions, we should not + * see them. + */ + @Test + public void testRejectRequestsOnAbort() throws Exception { + // We don't want to disrupt the server carrying meta, because we plan to disrupt requests to + // the server. Disrupting meta requests messes with the test. + HRegionServer serverWithoutMeta = null; + for (JVMClusterUtil.RegionServerThread regionServerThread : UTIL.getMiniHBaseCluster() + .getRegionServerThreads()) { + HRegionServer regionServer = regionServerThread.getRegionServer(); + if ( + regionServer.getRegions(TableName.META_TABLE_NAME).isEmpty() + && !regionServer.getRegions(TABLE_NAME).isEmpty() + ) { + serverWithoutMeta = regionServer; + break; + } + } + + assertNotNull("couldn't find a server without meta, but with test table regions", + serverWithoutMeta); + + Thread writer = new Thread(getWriterThreadRunnable(serverWithoutMeta.getServerName())); + writer.setDaemon(true); + writer.start(); + + // Trigger the abort. Our WriterThread will detect the first RegionServerAbortedException + // and trigger our custom queue to reject any more requests. This would typically result in + // CallQueueTooBigException, unless our logic in ServerRpcConnection to preempt the processing + // of a request is working. + serverWithoutMeta.abort("Abort RS for test"); + + // Wait for our expected exception to be thrown + synchronized (THROWN_EXCEPTION) { + while (THROWN_EXCEPTION.get() == null) { + THROWN_EXCEPTION.wait(); + } + } + + assertEquals(THROWN_EXCEPTION.get().getCause().getClass(), RegionServerAbortedException.class); + } + + private Runnable getWriterThreadRunnable(ServerName loadServer) { + return () -> { + try { + Configuration conf = UTIL.getConfiguration(); + conf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 5); + try (Connection conn = ConnectionFactory.createConnection(conf); + Table table = conn.getTableBuilder(TABLE_NAME, null) + .setRequestAttribute("test", new byte[] { 0 }).build()) { + // find the first region to exist on our test server, then submit requests to it + for (HRegionLocation regionLocation : table.getRegionLocator().getAllRegionLocations()) { + if (regionLocation.getServerName().equals(loadServer)) { + submitRequestsToRegion(table, regionLocation.getRegion()); + return; + } + } + throw new RuntimeException("Failed to find any regions for loadServer " + loadServer); + } + } catch (Exception e) { + LOG.warn("Failed to load data", e); + synchronized (THROWN_EXCEPTION) { + THROWN_EXCEPTION.set(e); + THROWN_EXCEPTION.notifyAll(); + } + } + }; + } + + private void submitRequestsToRegion(Table table, RegionInfo regionInfo) throws IOException { + byte[] rowKey = getRowKeyWithin(regionInfo); + int i = 0; + while (true) { + try { + i++; + table.put(new Put(rowKey).addColumn(CF, Bytes.toBytes(i), Bytes.toBytes(i))); + } catch (IOException e) { + // only catch RegionServerAbortedException once. After that, the next exception thrown Review Comment: What if the region has been reassigned to other region servers already? ########## hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerRejectDuringAbort.java: ########## @@ -0,0 +1,259 @@ +/* + * 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.regionserver; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; + +import java.io.IOException; +import java.util.Optional; +import java.util.concurrent.atomic.AtomicReference; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HBaseClassTestRule; +import org.apache.hadoop.hbase.HBaseTestingUtil; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.HRegionLocation; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.StartTestingClusterOption; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder; +import org.apache.hadoop.hbase.client.Connection; +import org.apache.hadoop.hbase.client.ConnectionFactory; +import org.apache.hadoop.hbase.client.Put; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.RetriesExhaustedException; +import org.apache.hadoop.hbase.client.Table; +import org.apache.hadoop.hbase.client.TableDescriptor; +import org.apache.hadoop.hbase.client.TableDescriptorBuilder; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.hadoop.hbase.coprocessor.RegionObserver; +import org.apache.hadoop.hbase.ipc.CallRunner; +import org.apache.hadoop.hbase.ipc.PluggableBlockingQueue; +import org.apache.hadoop.hbase.ipc.PriorityFunction; +import org.apache.hadoop.hbase.ipc.TestPluggableQueueImpl; +import org.apache.hadoop.hbase.testclassification.MediumTests; +import org.apache.hadoop.hbase.testclassification.RegionServerTests; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.hbase.util.JVMClusterUtil; +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.ClassRule; +import org.junit.Test; +import org.junit.experimental.categories.Category; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@Category({ RegionServerTests.class, MediumTests.class }) +public class TestRegionServerRejectDuringAbort { + + @ClassRule + public static final HBaseClassTestRule CLASS_RULE = + HBaseClassTestRule.forClass(TestRegionServerAbortTimeout.class); + + private static final Logger LOG = LoggerFactory.getLogger(TestRegionServerAbortTimeout.class); + + private static final HBaseTestingUtil UTIL = new HBaseTestingUtil(); + + private static TableName TABLE_NAME = TableName.valueOf("RSRejectOnAbort"); + + private static byte[] CF = Bytes.toBytes("cf"); + + private static final int REGIONS_NUM = 5; + + private static final AtomicReference<Exception> THROWN_EXCEPTION = new AtomicReference<>(null); + + private static volatile boolean shouldThrowTooBig = false; + + @BeforeClass + public static void setUp() throws Exception { + // Will schedule a abort timeout task after SLEEP_TIME_WHEN_CLOSE_REGION ms + UTIL.getConfiguration().set("hbase.ipc.server.callqueue.type", "pluggable"); + UTIL.getConfiguration().setClass("hbase.ipc.server.callqueue.pluggable.queue.class.name", + CallQueueTooBigThrowingQueue.class, PluggableBlockingQueue.class); + StartTestingClusterOption option = + StartTestingClusterOption.builder().numRegionServers(2).build(); + UTIL.startMiniCluster(option); + TableDescriptor td = TableDescriptorBuilder.newBuilder(TABLE_NAME) + .setCoprocessor(SleepWhenCloseCoprocessor.class.getName()) + .setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(CF).build()).build(); + UTIL.getAdmin().createTable(td, Bytes.toBytes("0"), Bytes.toBytes("9"), REGIONS_NUM); + } + + public static final class CallQueueTooBigThrowingQueue extends TestPluggableQueueImpl { + + public CallQueueTooBigThrowingQueue(int maxQueueLength, PriorityFunction priority, + Configuration conf) { + super(maxQueueLength, priority, conf); + } + + @Override + public boolean offer(CallRunner callRunner) { + if (shouldThrowTooBig && callRunner.getRpcCall().getRequestAttribute("test") != null) { + return false; + } + return super.offer(callRunner); + } + } + + @AfterClass + public static void tearDown() throws Exception { + UTIL.shutdownMiniCluster(); + } + + /** + * Tests that the logic in ServerRpcConnection works such that if the server is aborted, it short + * circuits any other logic. This means we no longer even attempt to enqueue the request onto the + * call queue. We verify this by using a special call queue which we can trigger to always return + * CallQueueTooBigException. If the logic works, despite forcing those exceptions, we should not + * see them. + */ + @Test + public void testRejectRequestsOnAbort() throws Exception { + // We don't want to disrupt the server carrying meta, because we plan to disrupt requests to + // the server. Disrupting meta requests messes with the test. + HRegionServer serverWithoutMeta = null; + for (JVMClusterUtil.RegionServerThread regionServerThread : UTIL.getMiniHBaseCluster() + .getRegionServerThreads()) { + HRegionServer regionServer = regionServerThread.getRegionServer(); + if ( + regionServer.getRegions(TableName.META_TABLE_NAME).isEmpty() + && !regionServer.getRegions(TABLE_NAME).isEmpty() + ) { + serverWithoutMeta = regionServer; + break; + } + } + + assertNotNull("couldn't find a server without meta, but with test table regions", + serverWithoutMeta); + + Thread writer = new Thread(getWriterThreadRunnable(serverWithoutMeta.getServerName())); + writer.setDaemon(true); + writer.start(); + + // Trigger the abort. Our WriterThread will detect the first RegionServerAbortedException + // and trigger our custom queue to reject any more requests. This would typically result in + // CallQueueTooBigException, unless our logic in ServerRpcConnection to preempt the processing + // of a request is working. + serverWithoutMeta.abort("Abort RS for test"); + + // Wait for our expected exception to be thrown + synchronized (THROWN_EXCEPTION) { Review Comment: Usually a wait should be in a while loop. Since this is just in a tests, let's just use a UTIL.waitFor to check the exception, and in this way we could have a timeout here. ########## hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerRejectDuringAbort.java: ########## @@ -0,0 +1,259 @@ +/* + * 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.regionserver; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; + +import java.io.IOException; +import java.util.Optional; +import java.util.concurrent.atomic.AtomicReference; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HBaseClassTestRule; +import org.apache.hadoop.hbase.HBaseTestingUtil; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.HRegionLocation; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.StartTestingClusterOption; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder; +import org.apache.hadoop.hbase.client.Connection; +import org.apache.hadoop.hbase.client.ConnectionFactory; +import org.apache.hadoop.hbase.client.Put; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.RetriesExhaustedException; +import org.apache.hadoop.hbase.client.Table; +import org.apache.hadoop.hbase.client.TableDescriptor; +import org.apache.hadoop.hbase.client.TableDescriptorBuilder; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.hadoop.hbase.coprocessor.RegionObserver; +import org.apache.hadoop.hbase.ipc.CallRunner; +import org.apache.hadoop.hbase.ipc.PluggableBlockingQueue; +import org.apache.hadoop.hbase.ipc.PriorityFunction; +import org.apache.hadoop.hbase.ipc.TestPluggableQueueImpl; +import org.apache.hadoop.hbase.testclassification.MediumTests; +import org.apache.hadoop.hbase.testclassification.RegionServerTests; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.hbase.util.JVMClusterUtil; +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.ClassRule; +import org.junit.Test; +import org.junit.experimental.categories.Category; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@Category({ RegionServerTests.class, MediumTests.class }) +public class TestRegionServerRejectDuringAbort { + + @ClassRule + public static final HBaseClassTestRule CLASS_RULE = + HBaseClassTestRule.forClass(TestRegionServerAbortTimeout.class); + + private static final Logger LOG = LoggerFactory.getLogger(TestRegionServerAbortTimeout.class); + + private static final HBaseTestingUtil UTIL = new HBaseTestingUtil(); + + private static TableName TABLE_NAME = TableName.valueOf("RSRejectOnAbort"); + + private static byte[] CF = Bytes.toBytes("cf"); + + private static final int REGIONS_NUM = 5; + + private static final AtomicReference<Exception> THROWN_EXCEPTION = new AtomicReference<>(null); + + private static volatile boolean shouldThrowTooBig = false; + + @BeforeClass + public static void setUp() throws Exception { + // Will schedule a abort timeout task after SLEEP_TIME_WHEN_CLOSE_REGION ms + UTIL.getConfiguration().set("hbase.ipc.server.callqueue.type", "pluggable"); + UTIL.getConfiguration().setClass("hbase.ipc.server.callqueue.pluggable.queue.class.name", + CallQueueTooBigThrowingQueue.class, PluggableBlockingQueue.class); + StartTestingClusterOption option = + StartTestingClusterOption.builder().numRegionServers(2).build(); + UTIL.startMiniCluster(option); + TableDescriptor td = TableDescriptorBuilder.newBuilder(TABLE_NAME) + .setCoprocessor(SleepWhenCloseCoprocessor.class.getName()) + .setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(CF).build()).build(); + UTIL.getAdmin().createTable(td, Bytes.toBytes("0"), Bytes.toBytes("9"), REGIONS_NUM); + } + + public static final class CallQueueTooBigThrowingQueue extends TestPluggableQueueImpl { + + public CallQueueTooBigThrowingQueue(int maxQueueLength, PriorityFunction priority, + Configuration conf) { + super(maxQueueLength, priority, conf); + } + + @Override + public boolean offer(CallRunner callRunner) { + if (shouldThrowTooBig && callRunner.getRpcCall().getRequestAttribute("test") != null) { + return false; + } + return super.offer(callRunner); + } + } + + @AfterClass + public static void tearDown() throws Exception { + UTIL.shutdownMiniCluster(); + } + + /** + * Tests that the logic in ServerRpcConnection works such that if the server is aborted, it short + * circuits any other logic. This means we no longer even attempt to enqueue the request onto the + * call queue. We verify this by using a special call queue which we can trigger to always return + * CallQueueTooBigException. If the logic works, despite forcing those exceptions, we should not + * see them. + */ + @Test + public void testRejectRequestsOnAbort() throws Exception { + // We don't want to disrupt the server carrying meta, because we plan to disrupt requests to + // the server. Disrupting meta requests messes with the test. + HRegionServer serverWithoutMeta = null; + for (JVMClusterUtil.RegionServerThread regionServerThread : UTIL.getMiniHBaseCluster() + .getRegionServerThreads()) { + HRegionServer regionServer = regionServerThread.getRegionServer(); + if ( + regionServer.getRegions(TableName.META_TABLE_NAME).isEmpty() + && !regionServer.getRegions(TABLE_NAME).isEmpty() + ) { + serverWithoutMeta = regionServer; + break; + } + } + + assertNotNull("couldn't find a server without meta, but with test table regions", + serverWithoutMeta); + + Thread writer = new Thread(getWriterThreadRunnable(serverWithoutMeta.getServerName())); + writer.setDaemon(true); + writer.start(); + + // Trigger the abort. Our WriterThread will detect the first RegionServerAbortedException + // and trigger our custom queue to reject any more requests. This would typically result in + // CallQueueTooBigException, unless our logic in ServerRpcConnection to preempt the processing + // of a request is working. + serverWithoutMeta.abort("Abort RS for test"); + + // Wait for our expected exception to be thrown + synchronized (THROWN_EXCEPTION) { + while (THROWN_EXCEPTION.get() == null) { + THROWN_EXCEPTION.wait(); + } + } + + assertEquals(THROWN_EXCEPTION.get().getCause().getClass(), RegionServerAbortedException.class); + } + + private Runnable getWriterThreadRunnable(ServerName loadServer) { + return () -> { + try { + Configuration conf = UTIL.getConfiguration(); + conf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 5); + try (Connection conn = ConnectionFactory.createConnection(conf); + Table table = conn.getTableBuilder(TABLE_NAME, null) + .setRequestAttribute("test", new byte[] { 0 }).build()) { + // find the first region to exist on our test server, then submit requests to it + for (HRegionLocation regionLocation : table.getRegionLocator().getAllRegionLocations()) { + if (regionLocation.getServerName().equals(loadServer)) { + submitRequestsToRegion(table, regionLocation.getRegion()); + return; + } + } + throw new RuntimeException("Failed to find any regions for loadServer " + loadServer); + } + } catch (Exception e) { + LOG.warn("Failed to load data", e); + synchronized (THROWN_EXCEPTION) { + THROWN_EXCEPTION.set(e); + THROWN_EXCEPTION.notifyAll(); + } + } + }; + } + + private void submitRequestsToRegion(Table table, RegionInfo regionInfo) throws IOException { + byte[] rowKey = getRowKeyWithin(regionInfo); + int i = 0; + while (true) { + try { + i++; + table.put(new Put(rowKey).addColumn(CF, Bytes.toBytes(i), Bytes.toBytes(i))); + } catch (IOException e) { + // only catch RegionServerAbortedException once. After that, the next exception thrown + // is our test case + if ( + !shouldThrowTooBig && e instanceof RetriesExhaustedException + && e.getCause() instanceof RegionServerAbortedException + ) { + shouldThrowTooBig = true; + } else { + throw e; + } + } + } + } + + private byte[] getRowKeyWithin(RegionInfo regionInfo) { + byte[] rowKey; + // region is start of table, find one after start key + if (regionInfo.getStartKey().length == 0) { + if (regionInfo.getEndKey().length == 0) { + // doesn't matter, single region table + return Bytes.toBytes(1); + } else { + // find a row just before endkey + rowKey = Bytes.copy(regionInfo.getEndKey()); + rowKey[rowKey.length - 1]--; + return rowKey; + } + } else { + return regionInfo.getStartKey(); + } + } + + public static class SleepWhenCloseCoprocessor implements RegionCoprocessor, RegionObserver { + + public SleepWhenCloseCoprocessor() { + } + + @Override + public Optional<RegionObserver> getRegionObserver() { + return Optional.of(this); + } + + @Override Review Comment: OK, we have a sleep here. But synchronized on a AtomiceReference may trigger some checkstyle warnings, but to have another lock object, or just use sleep and check here, since we are in a test. ########## hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerRejectDuringAbort.java: ########## @@ -0,0 +1,259 @@ +/* + * 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.regionserver; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; + +import java.io.IOException; +import java.util.Optional; +import java.util.concurrent.atomic.AtomicReference; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HBaseClassTestRule; +import org.apache.hadoop.hbase.HBaseTestingUtil; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.HRegionLocation; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.StartTestingClusterOption; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder; +import org.apache.hadoop.hbase.client.Connection; +import org.apache.hadoop.hbase.client.ConnectionFactory; +import org.apache.hadoop.hbase.client.Put; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.RetriesExhaustedException; +import org.apache.hadoop.hbase.client.Table; +import org.apache.hadoop.hbase.client.TableDescriptor; +import org.apache.hadoop.hbase.client.TableDescriptorBuilder; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.hadoop.hbase.coprocessor.RegionObserver; +import org.apache.hadoop.hbase.ipc.CallRunner; +import org.apache.hadoop.hbase.ipc.PluggableBlockingQueue; +import org.apache.hadoop.hbase.ipc.PriorityFunction; +import org.apache.hadoop.hbase.ipc.TestPluggableQueueImpl; +import org.apache.hadoop.hbase.testclassification.MediumTests; +import org.apache.hadoop.hbase.testclassification.RegionServerTests; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.hbase.util.JVMClusterUtil; +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.ClassRule; +import org.junit.Test; +import org.junit.experimental.categories.Category; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@Category({ RegionServerTests.class, MediumTests.class }) +public class TestRegionServerRejectDuringAbort { + + @ClassRule + public static final HBaseClassTestRule CLASS_RULE = + HBaseClassTestRule.forClass(TestRegionServerAbortTimeout.class); + + private static final Logger LOG = LoggerFactory.getLogger(TestRegionServerAbortTimeout.class); + + private static final HBaseTestingUtil UTIL = new HBaseTestingUtil(); + + private static TableName TABLE_NAME = TableName.valueOf("RSRejectOnAbort"); + + private static byte[] CF = Bytes.toBytes("cf"); + + private static final int REGIONS_NUM = 5; + + private static final AtomicReference<Exception> THROWN_EXCEPTION = new AtomicReference<>(null); + + private static volatile boolean shouldThrowTooBig = false; + + @BeforeClass + public static void setUp() throws Exception { + // Will schedule a abort timeout task after SLEEP_TIME_WHEN_CLOSE_REGION ms + UTIL.getConfiguration().set("hbase.ipc.server.callqueue.type", "pluggable"); + UTIL.getConfiguration().setClass("hbase.ipc.server.callqueue.pluggable.queue.class.name", + CallQueueTooBigThrowingQueue.class, PluggableBlockingQueue.class); + StartTestingClusterOption option = + StartTestingClusterOption.builder().numRegionServers(2).build(); + UTIL.startMiniCluster(option); + TableDescriptor td = TableDescriptorBuilder.newBuilder(TABLE_NAME) + .setCoprocessor(SleepWhenCloseCoprocessor.class.getName()) + .setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(CF).build()).build(); + UTIL.getAdmin().createTable(td, Bytes.toBytes("0"), Bytes.toBytes("9"), REGIONS_NUM); + } + + public static final class CallQueueTooBigThrowingQueue extends TestPluggableQueueImpl { + + public CallQueueTooBigThrowingQueue(int maxQueueLength, PriorityFunction priority, + Configuration conf) { + super(maxQueueLength, priority, conf); + } + + @Override + public boolean offer(CallRunner callRunner) { + if (shouldThrowTooBig && callRunner.getRpcCall().getRequestAttribute("test") != null) { + return false; + } + return super.offer(callRunner); + } + } + + @AfterClass + public static void tearDown() throws Exception { + UTIL.shutdownMiniCluster(); + } + + /** + * Tests that the logic in ServerRpcConnection works such that if the server is aborted, it short + * circuits any other logic. This means we no longer even attempt to enqueue the request onto the + * call queue. We verify this by using a special call queue which we can trigger to always return + * CallQueueTooBigException. If the logic works, despite forcing those exceptions, we should not + * see them. + */ + @Test + public void testRejectRequestsOnAbort() throws Exception { + // We don't want to disrupt the server carrying meta, because we plan to disrupt requests to + // the server. Disrupting meta requests messes with the test. + HRegionServer serverWithoutMeta = null; + for (JVMClusterUtil.RegionServerThread regionServerThread : UTIL.getMiniHBaseCluster() + .getRegionServerThreads()) { + HRegionServer regionServer = regionServerThread.getRegionServer(); + if ( + regionServer.getRegions(TableName.META_TABLE_NAME).isEmpty() + && !regionServer.getRegions(TABLE_NAME).isEmpty() + ) { + serverWithoutMeta = regionServer; + break; + } + } + + assertNotNull("couldn't find a server without meta, but with test table regions", + serverWithoutMeta); + + Thread writer = new Thread(getWriterThreadRunnable(serverWithoutMeta.getServerName())); + writer.setDaemon(true); + writer.start(); + + // Trigger the abort. Our WriterThread will detect the first RegionServerAbortedException + // and trigger our custom queue to reject any more requests. This would typically result in + // CallQueueTooBigException, unless our logic in ServerRpcConnection to preempt the processing + // of a request is working. + serverWithoutMeta.abort("Abort RS for test"); + + // Wait for our expected exception to be thrown + synchronized (THROWN_EXCEPTION) { + while (THROWN_EXCEPTION.get() == null) { + THROWN_EXCEPTION.wait(); + } + } + + assertEquals(THROWN_EXCEPTION.get().getCause().getClass(), RegionServerAbortedException.class); + } + + private Runnable getWriterThreadRunnable(ServerName loadServer) { + return () -> { + try { + Configuration conf = UTIL.getConfiguration(); + conf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 5); + try (Connection conn = ConnectionFactory.createConnection(conf); + Table table = conn.getTableBuilder(TABLE_NAME, null) + .setRequestAttribute("test", new byte[] { 0 }).build()) { + // find the first region to exist on our test server, then submit requests to it + for (HRegionLocation regionLocation : table.getRegionLocator().getAllRegionLocations()) { + if (regionLocation.getServerName().equals(loadServer)) { + submitRequestsToRegion(table, regionLocation.getRegion()); + return; + } + } + throw new RuntimeException("Failed to find any regions for loadServer " + loadServer); + } + } catch (Exception e) { + LOG.warn("Failed to load data", e); + synchronized (THROWN_EXCEPTION) { + THROWN_EXCEPTION.set(e); + THROWN_EXCEPTION.notifyAll(); + } + } + }; + } + + private void submitRequestsToRegion(Table table, RegionInfo regionInfo) throws IOException { + byte[] rowKey = getRowKeyWithin(regionInfo); Review Comment: Better at least add a sleep here? It could be very small but it will help reduce the pressure a lot... -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
