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Posted to dev@zookeeper.apache.org by "Dheeraj Agrawal (JIRA)" <ji...@apache.org> on 2011/06/24 00:14:47 UTC
[jira] [Commented] (ZOOKEEPER-1108) Various bugs in zoo_add_auth in
C
[ https://issues.apache.org/jira/browse/ZOOKEEPER-1108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054135#comment-13054135 ]
Dheeraj Agrawal commented on ZOOKEEPER-1108:
--------------------------------------------
Another Bug: in send_auth_info, the check is not correct
while (auth->next != NULL) { //--BUG: in cases where there is only one auth in the list, this will never send that auth, as its next will be NULL
rc = send_info_packet(zh, auth);
auth = auth->next;
}
FIX IS:
do {
rc = send_info_packet(zh, auth);
auth = auth->next;
} while (auth != NULL); //this will make sure that even if there is one auth ,that will get sent.
> Various bugs in zoo_add_auth in C
> ---------------------------------
>
> Key: ZOOKEEPER-1108
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1108
> Project: ZooKeeper
> Issue Type: Bug
> Components: c client
> Affects Versions: 3.3.3
> Reporter: Dheeraj Agrawal
> Fix For: 3.4.0
>
>
> 2 issues:
> In zoo_add_auth: there is a race condition:
> 2940 // [ZOOKEEPER-800] zoo_add_auth should return ZINVALIDSTATE if
> 2941 // the connection is closed.
> 2942 if (zoo_state(zh) == 0) {
> 2943 return ZINVALIDSTATE;
> 2944 }
> when we do zookeeper_init, the state is initialized to 0 and above we check if state = 0 then throw exception.
> There is a race condition where the doIo thread is slow and has not changed the state to CONNECTING, then you end up returning back ZKINVALIDSTATE.
> The problem is we use 0 for CLOSED state and UNINITIALIZED state. in case of uninitialized case it should let it go through.
> Also
> 2965 add_last_auth(&zh->auth_h, authinfo);
> 2966 zoo_unlock_auth(zh);
> 2967
> 2968 if(zh->state == ZOO_CONNECTED_STATE || zh->state == ZOO_ASSOCIATING_STATE)
> 2969 return send_last_auth_info(zh);
> if it is connected, we only send the last_auth_info, which may be different than the one we added, as we unlocked it before sending it.
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