Github user fuyou001 commented on a diff in the pull request:
https://github.com/apache/incubator-rocketmq/pull/158#discussion_r135705590
--- Diff:
broker/src/main/java/org/apache/rocketmq/broker/BrokerStartup.java ---
@@ -257,4 +268,28 @@ public static Options buildCommandlineOptions(final
Options options) {
return options;
}
+
+ private static void checkMQAlreadyStart(String storePathRootDir)
throws IOException {
+ File file = new
File(StorePathConfigHelper.getLockFile(storePathRootDir));
+ MappedFile.ensureDirOK(file.getParent());
+
+ final RandomAccessFile randomAccessFile = new
RandomAccessFile(file, "rw");
+ FileLock lock = randomAccessFile.getChannel().tryLock(0, 1, false);
+ if (lock == null || lock.isShared() || !lock.isValid()) {
+ throw new RuntimeException("Lock failed,MQ already started");
+ }
+
+
randomAccessFile.getChannel().write(ByteBuffer.wrap("lock".getBytes()));
+ randomAccessFile.getChannel().force(true);
+
+ Runtime.getRuntime().addShutdownHook(new Thread() {
--- End diff --
done
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