athanatos 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_r259966632
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File path: zookeeper-server/src/main/java/org/apache/zookeeper/ClientCnxn.java
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@@ -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:
A reasonable point. Nothing I could find directly compares cxid values or
will otherwise notice the MAX to MIN wrap, so I chose to use the full range.
I'll switch it.
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