001/**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.hadoop.hbase.util;
020
021import java.util.HashSet;
022import java.util.Set;
023
024import org.apache.yetus.audience.InterfaceAudience;
025import org.apache.yetus.audience.InterfaceStability;
026
027/**
028 * Utility class to get and check the current JVM version.
029 */
030@InterfaceAudience.Private
031@InterfaceStability.Stable
032public abstract class JvmVersion {
033  private static Set<String> BAD_JVM_VERSIONS = new HashSet<>();
034  static {
035    BAD_JVM_VERSIONS.add("1.6.0_18");
036  }
037
038  /**
039   * Return true if the current JVM version is known to be unstable with HBase.
040   */
041  public static boolean isBadJvmVersion() {
042    String version = System.getProperty("java.version");
043    return version != null && BAD_JVM_VERSIONS.contains(version);
044  }
045
046  /**
047   * Return the current JVM version information.
048   */
049  public static String getVersion() {
050    return System.getProperty("java.vm.vendor", "UNKNOWN_VM_VENDOR") + ' ' +
051      System.getProperty("java.version", "UNKNOWN_JAVA_VERSION") + '-' +
052      System.getProperty("java.vm.version", "UNKNOWN_VM_VERSION");
053  }
054}