| /* |
| * 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.cassandra.utils; |
| |
| import java.io.FileNotFoundException; |
| import java.net.SocketException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.concurrent.ScheduledExecutors; |
| import org.apache.cassandra.config.Config; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.io.FSError; |
| import org.apache.cassandra.io.sstable.CorruptSSTableException; |
| import org.apache.cassandra.service.StorageService; |
| |
| /** |
| * Responsible for deciding whether to kill the JVM if it gets in an "unstable" state (think OOM). |
| */ |
| public final class JVMStabilityInspector |
| { |
| private static final Logger logger = LoggerFactory.getLogger(JVMStabilityInspector.class); |
| private static Killer killer = new Killer(); |
| |
| private static Object lock = new Object(); |
| private static boolean printingHeapHistogram; |
| |
| private JVMStabilityInspector() {} |
| |
| /** |
| * Certain Throwables and Exceptions represent "Die" conditions for the server. |
| * This recursively checks the input Throwable's cause hierarchy until null. |
| * @param t |
| * The Throwable to check for server-stop conditions |
| */ |
| public static void inspectThrowable(Throwable t) |
| { |
| boolean isUnstable = false; |
| if (t instanceof OutOfMemoryError) |
| { |
| if (Boolean.getBoolean("cassandra.printHeapHistogramOnOutOfMemoryError")) |
| { |
| // We want to avoid printing multiple time the heap histogram if multiple OOM errors happen in a short |
| // time span. |
| synchronized(lock) |
| { |
| if (printingHeapHistogram) |
| return; |
| printingHeapHistogram = true; |
| } |
| HeapUtils.logHeapHistogram(); |
| } |
| |
| logger.error("OutOfMemory error letting the JVM handle the error:", t); |
| |
| StorageService.instance.removeShutdownHook(); |
| // We let the JVM handle the error. The startup checks should have warned the user if it did not configure |
| // the JVM behavior in case of OOM (CASSANDRA-13006). |
| throw (OutOfMemoryError) t; |
| } |
| |
| if (DatabaseDescriptor.getDiskFailurePolicy() == Config.DiskFailurePolicy.die) |
| if (t instanceof FSError || t instanceof CorruptSSTableException) |
| isUnstable = true; |
| |
| // Check for file handle exhaustion |
| if (t instanceof FileNotFoundException || t instanceof SocketException) |
| if (t.getMessage().contains("Too many open files")) |
| isUnstable = true; |
| |
| if (isUnstable) |
| killer.killCurrentJVM(t); |
| |
| if (t.getCause() != null) |
| inspectThrowable(t.getCause()); |
| } |
| |
| public static void inspectCommitLogThrowable(Throwable t) |
| { |
| if (!StorageService.instance.isSetupCompleted()) |
| { |
| logger.error("Exiting due to error while processing commit log during initialization.", t); |
| killer.killCurrentJVM(t, true); |
| } else if (DatabaseDescriptor.getCommitFailurePolicy() == Config.CommitFailurePolicy.die) |
| killer.killCurrentJVM(t); |
| else |
| inspectThrowable(t); |
| } |
| |
| public static void killCurrentJVM(Throwable t, boolean quiet) |
| { |
| killer.killCurrentJVM(t, quiet); |
| } |
| |
| public static void userFunctionTimeout(Throwable t) |
| { |
| switch (DatabaseDescriptor.getUserFunctionTimeoutPolicy()) |
| { |
| case die: |
| // policy to give 250ms grace time to |
| ScheduledExecutors.nonPeriodicTasks.schedule(() -> killer.killCurrentJVM(t), 250, TimeUnit.MILLISECONDS); |
| break; |
| case die_immediate: |
| killer.killCurrentJVM(t); |
| break; |
| case ignore: |
| logger.error(t.getMessage()); |
| break; |
| } |
| } |
| |
| @VisibleForTesting |
| public static Killer replaceKiller(Killer newKiller) { |
| Killer oldKiller = JVMStabilityInspector.killer; |
| JVMStabilityInspector.killer = newKiller; |
| return oldKiller; |
| } |
| |
| @VisibleForTesting |
| public static class Killer |
| { |
| private final AtomicBoolean killing = new AtomicBoolean(); |
| |
| /** |
| * Certain situations represent "Die" conditions for the server, and if so, the reason is logged and the current JVM is killed. |
| * |
| * @param t |
| * The Throwable to log before killing the current JVM |
| */ |
| protected void killCurrentJVM(Throwable t) |
| { |
| killCurrentJVM(t, false); |
| } |
| |
| protected void killCurrentJVM(Throwable t, boolean quiet) |
| { |
| if (!quiet) |
| { |
| t.printStackTrace(System.err); |
| logger.error("JVM state determined to be unstable. Exiting forcefully due to:", t); |
| } |
| if (killing.compareAndSet(false, true)) |
| { |
| StorageService.instance.removeShutdownHook(); |
| System.exit(100); |
| } |
| } |
| } |
| } |