Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hdfs-issues@hadoop.apache.org
Date: Mon, 9 Jul 2012 09:42:33 +0000 (UTC)
From: "Brahma Reddy Battula (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <1022972921.22064.1341826954543.JavaMail.jiratomcat@issues-vm>
In-Reply-To: <1916549076.22061.1341826416316.JavaMail.jiratomcat@issues-vm>
Subject: [jira] [Updated] (HDFS-3618) IF RC is other than zero, we are
 assuming that Service is down (What if NC command itself not found)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


     [ https://issues.apache.org/jira/browse/HDFS-3618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brahma Reddy Battula updated HDFS-3618:
---------------------------------------

    Description: 
Started NN's and zkfc's in Suse11.
Suse11 will have netcat installation and netcat -z will work(but nc -z wn't work)..
While executing following command, got command not found hence rc will be other than zero and assuming that server was down..Here we are ending up without checking whether service is down or not..
{code}
LOG.info(
            "Indeterminate response from trying to kill service. " +
            "Verifying whether it is running using nc...");
        rc = execCommand(session, "nc -z " + serviceAddr.getHostName() +
            " " + serviceAddr.getPort());
        if (rc == 0) {
          // the service is still listening - we are unable to fence
          LOG.warn("Unable to fence - it is running but we cannot kill it");
          return false;
        } else {
          LOG.info("Verified that the service is down.");
          return true;          
        }

{code}


  was:
Started NN's and zkfc's are Suse11.
Suse11 will have netcat installation and netcat -z will work(but nc -z wn't work)..
While executing following command, got command not found hence rc will be other than zero and assuming that server was down..Here we are ending up without checking whether service is down or not..
{code}
LOG.info(
            "Indeterminate response from trying to kill service. " +
            "Verifying whether it is running using nc...");
        rc = execCommand(session, "nc -z " + serviceAddr.getHostName() +
            " " + serviceAddr.getPort());
        if (rc == 0) {
          // the service is still listening - we are unable to fence
          LOG.warn("Unable to fence - it is running but we cannot kill it");
          return false;
        } else {
          LOG.info("Verified that the service is down.");
          return true;          
        }

{code}


        Summary: IF RC is other than zero, we are assuming that Service is down (What if NC command itself not found)  (was: IF RC is other than zero are we assuming that Service is down (What if NC command itself not found))
    
> IF RC is other than zero, we are assuming that Service is down (What if NC command itself not found)
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3618
>                 URL: https://issues.apache.org/jira/browse/HDFS-3618
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: auto-failover
>            Reporter: Brahma Reddy Battula
>
> Started NN's and zkfc's in Suse11.
> Suse11 will have netcat installation and netcat -z will work(but nc -z wn't work)..
> While executing following command, got command not found hence rc will be other than zero and assuming that server was down..Here we are ending up without checking whether service is down or not..
> {code}
> LOG.info(
>             "Indeterminate response from trying to kill service. " +
>             "Verifying whether it is running using nc...");
>         rc = execCommand(session, "nc -z " + serviceAddr.getHostName() +
>             " " + serviceAddr.getPort());
>         if (rc == 0) {
>           // the service is still listening - we are unable to fence
>           LOG.warn("Unable to fence - it is running but we cannot kill it");
>           return false;
>         } else {
>           LOG.info("Verified that the service is down.");
>           return true;          
>         }
> {code}

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira