rocketmq Lock failed,MQ already started -c参数

今天部署rocketmq集群时一台机器部署一个master 和slave，slave部署总是失败，通过查看日志显示下面的错误

java.lang.RuntimeException: Lock failed,MQ already started
	at org.apache.rocketmq.store.DefaultMessageStore.start(DefaultMessageStore.java:214)
	at org.apache.rocketmq.broker.BrokerController.start(BrokerController.java:654)
	at org.apache.rocketmq.broker.BrokerStartup.start(BrokerStartup.java:62)
	at org.apache.rocketmq.broker.BrokerStartup.main(BrokerStartup.java:56)
23:21:47.512 [main] ERROR RocketmqCommon - Failed to obtain the host name
java.net.UnknownHostException: slave02: slave02: unknown error
	at java.net.InetAddress.getLocalHost(InetAddress.java:1505) ~[na:1.8.0_65]
	at org.apache.rocketmq.common.BrokerConfig.localHostName(BrokerConfig.java:202) [rocketmq-common-4.2.0.jar:4.2.0]
	at org.apache.rocketmq.common.BrokerConfig.<init>(BrokerConfig.java:39) [rocketmq-common-4.2.0.jar:4.2.0]
	at org.apache.rocketmq.broker.BrokerStartup.createBrokerController(BrokerStartup.java:101) [rocketmq-broker-4.2.0.jar:4.2.0]
	at org.apache.rocketmq.broker.BrokerStartup.main(BrokerStartup.java:56) [rocketmq-broker-4.2.0.jar:4.2.0]
Caused by: java.net.UnknownHostException: slave02: unknown error
	at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_65]
	at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) ~[na:1.8.0_65]
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) ~[na:1.8.0_65]
	at java.net.InetAddress.getLocalHost(InetAddress.java:1500) ~[na:1.8.0_65]
	... 4 common frames omitted
java.lang.RuntimeException: Lock failed,MQ already started
	at org.apache.rocketmq.store.DefaultMessageStore.start(DefaultMessageStore.java:214)
	at org.apache.rocketmq.broker.BrokerController.start(BrokerController.java:654)
	at org.apache.rocketmq.broker.BrokerStartup.start(BrokerStartup.java:62)
	at org.apache.rocketmq.broker.BrokerStartup.main(BrokerStartup.java:56)
23:22:32.218 [main] ERROR RocketmqCommon - Failed to obtain the host name
java.net.UnknownHostException: slave02: slave02: unknown error
	at java.net.InetAddress.getLocalHost(InetAddress.java:1505) ~[na:1.8.0_65]
	at org.apache.rocketmq.common.BrokerConfig.localHostName(BrokerConfig.java:202) [rocketmq-common-4.2.0.jar:4.2.0]
	at org.apache.rocketmq.common.BrokerConfig.<init>(BrokerConfig.java:39) [rocketmq-common-4.2.0.jar:4.2.0]
	at org.apache.rocketmq.broker.BrokerStartup.createBrokerController(BrokerStartup.java:101) [rocketmq-broker-4.2.0.jar:4.2.0]
	at org.apache.rocketmq.broker.BrokerStartup.main(BrokerStartup.java:56) [rocketmq-broker-4.2.0.jar:4.2.0]

错误1.  slave02: unknown error是由于我启动的时候启动命令没有-c走的默认的代码中的配置

public class BrokerConfig {
    private static final Logger log = LoggerFactory.getLogger(LoggerName.COMMON_LOGGER_NAME);

    private String rocketmqHome = System.getProperty(MixAll.ROCKETMQ_HOME_PROPERTY, System.getenv(MixAll.ROCKETMQ_HOME_ENV));
    @ImportantField
    private String namesrvAddr = System.getProperty(MixAll.NAMESRV_ADDR_PROPERTY, System.getenv(MixAll.NAMESRV_ADDR_ENV));
    @ImportantField
    private String brokerIP1 = RemotingUtil.getLocalAddress();
    private String brokerIP2 = RemotingUtil.getLocalAddress();
    @ImportantField
    private String brokerName = localHostName();
    @ImportantField
    private String brokerClusterName = "DefaultCluster";
    @ImportantField
    private long brokerId = MixAll.MASTER_ID;
    private int brokerPermission = PermName.PERM_READ | PermName.PERM_WRITE;

错误2.  Lock failed,MQ already started也是走的代码默认的配置

DefaultMessageStore.java

 public void start() throws Exception {

         lock = lockFile.getChannel().tryLock(0, 1, false);
         if (lock == null || lock.isShared() || !lock.isValid()) {
             throw new RuntimeException("Lock failed,MQ already started");
         }

         lockFile.getChannel().write(ByteBuffer.wrap("lock".getBytes()));
         lockFile.getChannel().force(true);

         this.flushConsumeQueueService.start();
         this.commitLog.start();
         this.storeStatsService.start();

DefaultMessageStore.java

  public DefaultMessageStore(final MessageStoreConfig messageStoreConfig, final BrokerStatsManager brokerStatsManager,
         final MessageArrivingListener messageArrivingListener, final BrokerConfig brokerConfig) throws IOException {
         this.messageArrivingListener = messageArrivingListener;
         this.brokerConfig = brokerConfig;
         this.messageStoreConfig = messageStoreConfig;
         this.brokerStatsManager = brokerStatsManager;
         this.allocateMappedFileService = new AllocateMappedFileService(this);
         this.commitLog = new CommitLog(this);
         this.consumeQueueTable = new ConcurrentHashMap<>(32);

         this.flushConsumeQueueService = new FlushConsumeQueueService();
         this.cleanCommitLogService = new CleanCommitLogService();
         this.cleanConsumeQueueService = new CleanConsumeQueueService();
         this.storeStatsService = new StoreStatsService();
         this.indexService = new IndexService(this);
         this.haService = new HAService(this);

         this.reputMessageService = new ReputMessageService();

         this.scheduleMessageService = new ScheduleMessageService(this);

         this.transientStorePool = new TransientStorePool(messageStoreConfig);

         if (messageStoreConfig.isTransientStorePoolEnable()) {
             this.transientStorePool.init();
         }

         this.allocateMappedFileService.start();

         this.indexService.start();

         this.dispatcherList = new LinkedList<>();
         this.dispatcherList.addLast(new CommitLogDispatcherBuildConsumeQueue());
         this.dispatcherList.addLast(new CommitLogDispatcherBuildIndex());

         File file = new File(StorePathConfigHelper.getLockFile(messageStoreConfig.getStorePathRootDir()));
         MappedFile.ensureDirOK(file.getParent());
         lockFile = new RandomAccessFile(file, "rw");
     }

BrokerController.java

 public BrokerController(
         final BrokerConfig brokerConfig,
         final NettyServerConfig nettyServerConfig,
         final NettyClientConfig nettyClientConfig,
         final MessageStoreConfig messageStoreConfig
     ) {
         this.brokerConfig = brokerConfig;
         this.nettyServerConfig = nettyServerConfig;
         this.nettyClientConfig = nettyClientConfig;
         this.messageStoreConfig = messageStoreConfig;
.....剩余代码不贴了

MessageStoreConfig.java

 public class MessageStoreConfig {
     //The root directory in which the log data is kept
     @ImportantField
     private String storePathRootDir = System.getProperty("user.home") + File.separator + "store";

     //The directory in which the commitlog is kept
     @ImportantField
     private String storePathCommitLog = System.getProperty("user.home") + File.separator + "store"
         + File.separator + "commitlog";

     // CommitLog file size,default is 1G
     private int mapedFileSizeCommitLog = 1024 * 1024 * 1024;
     // ConsumeQueue file size,default is 30W
     private int mapedFileSizeConsumeQueue = 300000 * ConsumeQueue.CQ_STORE_UNIT_SIZE;
     // enable consume queue ext
     private boolean enableConsumeQueueExt = false;
     // ConsumeQueue extend file size, 48M
     private int mappedFileSizeConsumeQueueExt = 48 * 1024 * 1024;
     // Bit count of filter bit map.
     // this will be set by pipe of calculate filter bit map.
     private int bitMapLengthConsumeQueueExt = 64;

如果不加-c就是在默认路径下，自己可以去${user.dir}下去看看，肯定有这个目录

所以多次启动不加-c参数就会报上面错误

 if (commandLine.hasOption('c')) {
                 String file = commandLine.getOptionValue('c');
                 if (file != null) {
                     configFile = file;
                     InputStream in = new BufferedInputStream(new FileInputStream(file));
                     properties = new Properties();
                     properties.load(in);

                     properties2SystemEnv(properties);
                     MixAll.properties2Object(properties, brokerConfig);
                     MixAll.properties2Object(properties, nettyServerConfig);
                     MixAll.properties2Object(properties, nettyClientConfig);
                     MixAll.properties2Object(properties, messageStoreConfig);

                     BrokerPathConfigHelper.setBrokerConfigPath(file);
                     in.close();
                 }
             }

最后梳理一下启动流程

nohup sh mqbroker -c ${mqdir}/conf/2m-2s-sync/broker-a.properties &的启动流程

1.加载启动类BrokerStartup.java main方法

2.createBrokerController方法加载启动参数并确定使用默认配置还是读取对应的配置文件 主要是-c参数的作用

3.加载配置

有错误之处望指正。