| /** |
| * 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.procedure2; |
| |
| import java.util.concurrent.DelayQueue; |
| import org.apache.hadoop.hbase.procedure2.util.DelayedUtil; |
| import org.apache.hadoop.hbase.procedure2.util.DelayedUtil.DelayedWithTimeout; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Runs task on a period such as check for stuck workers. |
| * @see InlineChore |
| */ |
| @InterfaceAudience.Private |
| class TimeoutExecutorThread<TEnvironment> extends StoppableThread { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(TimeoutExecutorThread.class); |
| |
| private final ProcedureExecutor<TEnvironment> executor; |
| |
| private final DelayQueue<DelayedWithTimeout> queue = new DelayQueue<>(); |
| |
| public TimeoutExecutorThread(ProcedureExecutor<TEnvironment> executor, ThreadGroup group, |
| String name) { |
| super(group, name); |
| setDaemon(true); |
| this.executor = executor; |
| } |
| |
| @Override |
| public void sendStopSignal() { |
| queue.add(DelayedUtil.DELAYED_POISON); |
| } |
| |
| @Override |
| public void run() { |
| while (executor.isRunning()) { |
| final DelayedWithTimeout task = DelayedUtil.takeWithoutInterrupt(queue); |
| if (task == null || task == DelayedUtil.DELAYED_POISON) { |
| // the executor may be shutting down, |
| // and the task is just the shutdown request |
| continue; |
| } |
| LOG.trace("Executing {}", task); |
| |
| // execute the task |
| if (task instanceof InlineChore) { |
| execInlineChore((InlineChore) task); |
| } else if (task instanceof DelayedProcedure) { |
| execDelayedProcedure((DelayedProcedure<TEnvironment>) task); |
| } else { |
| LOG.error("CODE-BUG unknown timeout task type {}", task); |
| } |
| } |
| } |
| |
| public void add(InlineChore chore) { |
| chore.refreshTimeout(); |
| queue.add(chore); |
| } |
| |
| public void add(Procedure<TEnvironment> procedure) { |
| LOG.info("ADDED {}; timeout={}, timestamp={}", procedure, procedure.getTimeout(), |
| procedure.getTimeoutTimestamp()); |
| queue.add(new DelayedProcedure<>(procedure)); |
| } |
| |
| public boolean remove(Procedure<TEnvironment> procedure) { |
| return queue.remove(new DelayedProcedure<>(procedure)); |
| } |
| |
| private void execInlineChore(InlineChore chore) { |
| chore.run(); |
| add(chore); |
| } |
| |
| private void execDelayedProcedure(DelayedProcedure<TEnvironment> delayed) { |
| // TODO: treat this as a normal procedure, add it to the scheduler and |
| // let one of the workers handle it. |
| // Today we consider ProcedureInMemoryChore as InlineChores |
| Procedure<TEnvironment> procedure = delayed.getObject(); |
| if (procedure instanceof ProcedureInMemoryChore) { |
| executeInMemoryChore((ProcedureInMemoryChore<TEnvironment>) procedure); |
| // if the procedure is in a waiting state again, put it back in the queue |
| procedure.updateTimestamp(); |
| if (procedure.isWaiting()) { |
| delayed.setTimeout(procedure.getTimeoutTimestamp()); |
| queue.add(delayed); |
| } |
| } else { |
| executeTimedoutProcedure(procedure); |
| } |
| } |
| |
| private void executeInMemoryChore(ProcedureInMemoryChore<TEnvironment> chore) { |
| if (!chore.isWaiting()) { |
| return; |
| } |
| |
| // The ProcedureInMemoryChore is a special case, and it acts as a chore. |
| // instead of bringing the Chore class in, we reuse this timeout thread for |
| // this special case. |
| try { |
| chore.periodicExecute(executor.getEnvironment()); |
| } catch (Throwable e) { |
| LOG.error("Ignoring {} exception: {}", chore, e.getMessage(), e); |
| } |
| } |
| |
| protected void executeTimedoutProcedure(Procedure<TEnvironment> proc) { |
| // The procedure received a timeout. if the procedure itself does not handle it, |
| // call abort() and add the procedure back in the queue for rollback. |
| if (proc.setTimeoutFailure(executor.getEnvironment())) { |
| long rootProcId = executor.getRootProcedureId(proc); |
| RootProcedureState<TEnvironment> procStack = executor.getProcStack(rootProcId); |
| procStack.abort(); |
| executor.getStore().update(proc); |
| executor.getScheduler().addFront(proc); |
| } |
| } |
| } |