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After Domain migration in our environment, unable to submit job

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Article ID: 237024

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Updated On:

Products

CA Automic Dollar Universe

Issue/Introduction

We had domain migration in our environment to align to domain changes at organization. We noticed that post this we are unable to submit a Job though node shows online on the UVC console.

When trying to submit a job/node settings we get below error

Server cannot be reached: ServerException *

Cause

As we reviewed the logs we see below errors.

Examples of error Messages :
From UVC log file: 
#####
Agent IO Connection problem - ServerException - connect: error creating socket to node_name/port_number
#####

From unijob universe.log file: 
#####
u_connect | u_gethostbyname_mf(uvms_node_name) returns error: Unknown host (gethostbyname(uvms_node_name) returns null pointer)
#####

Post domain migration it resulted in change of the DNS of nodes and this is not updated in UVMS, which still have old DNS mapping against each node. When a Job is launched, it still tried to resolve to old DNS of node which doesn't exist any more and hence result in error

Server cannot be reached: ServerException *

Validation 

Note: For troubleshooting connectivity issues refer additional information section "DUAS: Communication issues between UVMS/UVC and Nodes through the network" 

  • UVMS server: run below command
$ping FQDN_OF_THE_NODE

#Output: request could not find host
  • UVMS Server, validate the hostname of the NODES (refer additional information section for unilst command document)
$UVMS_INSTALL_DIR\app\bin\unilst NODE -full

$UVMS_INSTALL_DIR\app\bin\unilst NODE -full -node <NODE_NAME_OR_FILTER>

Environment

Release : 6.x

Component : DOLLAR UNIVERSE

Resolution

Update the Dollar Universe node registration in the list of UVMS nodes. The mentioned steps need to be performed on DUAS sever

  1. Load node environment: $NODE_INSTALL_DIR\unienv.(bat|ksh)
  2. Check connectivity to UNIMS: $NODE_INSTALL_DIR\bin\unims -checkms
  3. Stop the node : $NODE_INSTALL_DIR\bin\unistop 
  4. Update the node hostname: $NODE_INSTALL_DIR\bin\unims -update -host NEW_FQDN_OF_THE_NODE
  5. Start the node: $NODE_INSTALL_DIR\bin\unistart

Additional Information