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HDFS >> mail # dev >> Re: [jira] [Created] (HDFS-4824) FileInputStreamCache.close leaves dangling reference to FileInputStreamCache.cacheCleaner


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Re: [jira] [Created] (HDFS-4824) FileInputStreamCache.close leaves dangling reference to FileInputStreamCache.cacheCleaner
Hi,

I am facing a problem.

I am using Talend for scheduling and running a job. But, I am getting a
error. can anybody please help.

[2013-05-15 16:30:59]Deploying job to Hadoop...
[2013-05-15 16:31:08]Deployment failed!
[2013-05-15 16:31:08]Can not access Hadoop File System with user root!
[2013-05-15 16:31:08]Server IPC version 7 cannot communicate with client
version 4

Regards,
Shouvanik
On Wed, May 15, 2013 at 3:55 AM, Henry Robinson (JIRA) <[EMAIL PROTECTED]>wrote:

> Henry Robinson created HDFS-4824:
> ------------------------------------
>
>              Summary: FileInputStreamCache.close leaves dangling reference
> to FileInputStreamCache.cacheCleaner
>                  Key: HDFS-4824
>                  URL: https://issues.apache.org/jira/browse/HDFS-4824
>              Project: Hadoop HDFS
>           Issue Type: Bug
>           Components: hdfs-client
>     Affects Versions: 2.0.4-alpha
>             Reporter: Henry Robinson
>             Assignee: Colin Patrick McCabe
>
>
> {{FileInputStreamCache}} leaves around a reference to its {{cacheCleaner}}
> after {{close()}}.
>
> The {{cacheCleaner}} is created like this:
>
> {code}
> if (cacheCleaner == null) {
>           cacheCleaner = new CacheCleaner();
>           executor.scheduleAtFixedRate(cacheCleaner, expiryTimeMs,
> expiryTimeMs,
>               TimeUnit.MILLISECONDS);
>         }
> {code}
>
> and supposedly removed like this:
>
> {code}
> if (cacheCleaner != null) {
>   executor.remove(cacheCleaner);
> }
> {code}
>
> However, {{ScheduledThreadPoolExecutor.remove}} returns a success boolean
> which should be checked. And I _think_ from a quick read of that class that
> the return value of {{scheduleAtFixedRate}} should be used as the argument
> to {{remove}}.
>
> --
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>

--
Thanks,
*Shouvanik*