Home Forums HDP on Linux – Installation Firewall, brings up alerts in Ambari – confguring ports

This topic contains 4 replies, has 3 voices, and was last updated by  Sivagamasundari Veerabahu 1 year ago.

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  • #44598

    All ports are configured as per the doc in Ambari install doc, but still when we try to bring the firewall up i see the below alerts in Ambari
    Any reason why
    Port 19888, 8032,8088 are all configured.
    Please advice

    HistoryServer CPU utilization UNKNOWN for about a minute
    Unable to contact host:
    ResourceManager CPU utilization UNKNOWN for about a minute
    Unable to contact host:

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  • #44672

    After configuring the port for snmp I was able to bring the firewall up without issuing any alerts.
    So now my Ambari dashboard looks good..No alerts

    But when the firewall is up,
    My Hive query (simple select count(*) from table) runs forever, the map task completes to 100% and then comes back to 0% and so on and runs forever.more than 45 minutes..
    Once I bring the firewall down, the same query finishes in 13 secs.
    Any reason why ?

    2013-12-02 14:15:45,139 Stage-1 map = 100%, reduce = 0%
    13/12/02 14:15:45 INFO exec.Task: 2013-12-02 14:15:45,139 Stage-1 map = 100%, reduce = 0%
    2013-12-02 14:16:45,429 Stage-1 map = 100%, reduce = 0%
    13/12/02 14:16:45 INFO exec.Task: 2013-12-02 14:16:45,429 Stage-1 map = 100%, reduce = 0%
    2013-12-02 14:17:45,527 Stage-1 map = 100%, reduce = 0%
    13/12/02 14:17:45 INFO exec.Task: 2013-12-02 14:17:45,527 Stage-1 map = 100%, reduce = 0%
    2013-12-02 14:17:50,620 Stage-1 map = 0%, reduce = 0%
    13/12/02 14:17:50 INFO exec.Task: 2013-12-02 14:17:50,620 Stage-1 map = 0%, reduce = 0%
    13/12/02 14:18:50 INFO exec.Task: 2013-12-02 14:18:50,697 Stage-1 map = 0%, reduce = 0%

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    #44608

    Yes, I am trying to bring up the firewall on both the nodes, I have a 2 node cluster on Linux.
    When the firewall is down everything is good. We had it down for the install.. now that everything is installed and stable and working, we tried configuring the ports and tried to bring up the firewall.
    All ports mentioned on the ambari install doc was configured but still got those alerts, I will check the snmp ports as well.
    Anything else I need to check ?

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    #44605

    Kenny Zhang
    Moderator

    Hi,

    Do you mean the firewall within the cluster? So if the firewall is down, then everything works fine, right?

    Thanks,
    Kenny

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    #44601

    Jeff Sposetti
    Moderator

    The Nagios check for CPU utilization (against HistoryServer, ResourceManager, NameNode, etc components) uses SNMP.

    Is snmp port open between Nagios Server and those hosts?

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