zookeeper-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2901) Session ID that is negative causes mis-calculation of Ephemeral Type
Date Tue, 26 Sep 2017 22:25:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16181681#comment-16181681
] 

ASF GitHub Bot commented on ZOOKEEPER-2901:
-------------------------------------------

Github user afine commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/377#discussion_r141200124
  
    --- Diff: src/java/main/org/apache/zookeeper/server/SessionTrackerImpl.java ---
    @@ -84,6 +84,9 @@ public static long initializeNextSession(long id) {
             long nextSid;
             nextSid = (Time.currentElapsedTime() << 24) >>> 8;
             nextSid =  nextSid | (id <<56);
    +        if (nextSid == EphemeralType.CONTAINER_EPHEMERAL_OWNER) {
    +            ++nextSid;  // this is an unlikely edge case, but check it just in case
    --- End diff --
    
    This makes me nervous but I can't think of a reason why it wont work. It may be worth
changing the comment on this method because it is no longer strictly true. 


> Session ID that is negative causes mis-calculation of Ephemeral Type
> --------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2901
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2901
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.5.3
>         Environment: Running 3.5.3-beta in Docker container
>            Reporter: Mark Johnson
>            Assignee: Jordan Zimmerman
>            Priority: Blocker
>
> In the code that determines the EphemeralType it is looking at the owner (which is the
client ID or connection ID):
> EphemeralType.java:
>    public static EphemeralType get(long ephemeralOwner) {
>        if (ephemeralOwner == CONTAINER_EPHEMERAL_OWNER) {
>            return CONTAINER;
>        }
>        if (ephemeralOwner < 0) {
>            return TTL;
>        }
>        return (ephemeralOwner == 0) ? VOID : NORMAL;
>    }
> However my connection ID is:
> header.getClientId(): -720548323429908480
> This causes the code to think this is a TTL Ephemeral node instead of a
> NORMAL Ephemeral node.
> This also explains why this is random - if my client ID is non-negative
> then the node gets added correctly.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Mime
View raw message