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From GitBox <...@apache.org>
Subject [GitHub] phunt commented on a change in pull request #787: ZOOKEEPER-3253: client should not send requests with cxid=-4, -2, or -1
Date Tue, 26 Feb 2019 04:45:18 GMT
phunt commented on a change in pull request #787: ZOOKEEPER-3253: client should not send requests
with cxid=-4, -2, or -1
URL: https://github.com/apache/zookeeper/pull/787#discussion_r260123920
 
 

 ##########
 File path: zookeeper-server/src/main/java/org/apache/zookeeper/ClientCnxn.java
 ##########
 @@ -1510,6 +1511,11 @@ public void close() throws IOException {
      * the server. Thus, getXid() must be public.
      */
     synchronized public int getXid() {
+        // xid values of -4, -2, and -1 are special, see SendThread.readResponse
+        // Skip from -5 to 1.
 
 Review comment:
   Sounds good, thanks. Essentially negative cxid are essentially "reserved" this way.

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