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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 Wed, 24 Jan 2018 23:39:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16338436#comment-16338436
] 

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

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

    https://github.com/apache/zookeeper/pull/377#discussion_r163712641
  
    --- Diff: src/java/main/org/apache/zookeeper/server/ZooKeeperServer.java ---
    @@ -476,9 +474,12 @@ public ZooKeeperServerListener getZooKeeperServerListener() {
             return listener;
         }
     
    +    // Visible for testing
    +    static volatile int serverId = 1;
    --- End diff --
    
    It being a global seems to kick the problem down the road to the next person. I'm worried
that setting this jvm wide could have an impact when developing tests in the future. That's
why it caught my eye.


> 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.



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