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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2757) Incorrect path crashes zkCli
Date Fri, 19 May 2017 05:54:04 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16016929#comment-16016929
] 

ASF GitHub Bot commented on ZOOKEEPER-2757:
-------------------------------------------

Github user afine commented on the issue:

    https://github.com/apache/zookeeper/pull/240
  
    @hanm I'm not sure that we should always assume that an IllegalArgumentException will
only be thrown when a path is invalid. Since IllegalArgumentException does not need to be
caught, it will be difficult for us to tell if we are masking IllegalArgumentExceptions thrown
for other reasons. So we should minimize the code surrounded by `try { } catch(IllegalArgumentException
e) {}` We cannot catch them within the methods of ZooKeeper.java so I think catching them
at the "Command" level is the best we can do.
    
    IllegalArgumentException is a RuntimeException, which should represent a "programming
problem" (http://docs.oracle.com/javase/tutorial/essential/exceptions/runtime.html). 
    >Runtime exceptions represent problems that are the result of a programming problem,
and as such, the API client code cannot reasonably be expected to recover from them or to
handle them in any way. 
    
    So if it does pop up for reasons other than a bad path, we should certainly bubble it
up and kill the CLI.
    
    We abuse IllegalArgumentException all over ZK, I believe we should change this exception
type in 3.6.
    
     


> Incorrect path crashes zkCli
> ----------------------------
>
>                 Key: ZOOKEEPER-2757
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2757
>             Project: ZooKeeper
>          Issue Type: Bug
>    Affects Versions: 3.5.3
>            Reporter: Flavio Junqueira
>            Assignee: Abraham Fine
>            Priority: Minor
>             Fix For: 3.5.4
>
>
> If I try {{delete test}} without the leading /, then the CLI crashes with this exception:
> {noformat}
> Exception in thread "main" java.lang.IllegalArgumentException: Path must start with /
character
> 	at org.apache.zookeeper.common.PathUtils.validatePath(PathUtils.java:51)
> 	at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:1659)
> 	at org.apache.zookeeper.cli.DeleteCommand.exec(DeleteCommand.java:83)
> 	at org.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:655)
> 	at org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:586)
> 	at org.apache.zookeeper.ZooKeeperMain.executeLine(ZooKeeperMain.java:370)
> 	at org.apache.zookeeper.ZooKeeperMain.run(ZooKeeperMain.java:330)
> 	at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:292)
> {noformat}
> It should really fail the operation rather than crash the CLI.



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