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From "maoling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-3290) Throw detailed KeeperException when a transaction failed
Date Tue, 26 Feb 2019 11:45:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-3290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16777843#comment-16777843
] 

maoling commented on ZOOKEEPER-3290:
------------------------------------

[~Tison]

Just go ahead !

> Throw detailed KeeperException when a transaction failed
> --------------------------------------------------------
>
>                 Key: ZOOKEEPER-3290
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3290
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.5.4, 3.4.13
>            Reporter: TisonKun
>            Priority: Major
>             Fix For: 3.5.5, 3.4.14
>
>
> Assume we execute the follow statements
> {code:java}
> ZooKeeper zk = ...;
> zk.multi(Arrays.asList(
>   Op.check(path1, -1),
>   Op.delete(path2, -1)));
> {code}
> If path1 or path2 didn't exist, we got an exception {{KeeperException.NoNodeException}}
without which of them doesn't exist.
> The reason is when we executed {{PrepRequestProccessor#pRequest}} in {{PrepRequestProccessor#L804}},
it processed {{KeeperException.NoNodeException}} which contained path info.
> However, we generated {{ErrorTxn}} which only contains {{err}} field represented
error code and lost path info. Maybe a reasonable resolution is extend {{ErrorTxn}} to contain
path info or a general {{data}} byte array.



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