JCO_ERROR_COMMUNICATION - Loading Backend fails

[former_member400663]

Hi,

Deploying a Agentry WorkManager Solution in SMP 3.0 has issues connecting to Backend. On creating a new application in SMP Cockpit and doing a development publish works fine with Backend details populating.Placing the JavaBE.ini file with Backend connection details, Java folder, setting classpath and then restarting server, java backend loading fails in SMP Admin Cockpit and also the Agentry application throws an error as below

JAVA EXCEPTION CAUGHT: com.syclo.agentry.AgentryException: JCO_ERROR_COMMUNICATION Connect to message server host failed

Connection parameters: TYPE=B DEST=custom_USER_AUTH MSHOST=<servername> R3NAME=<SID> GROUP=AED_MOBILE_GROUP PCS=1 LOCATION CPIC (TCP/IP) on local host <Client machine> with Unicode ERROR service '?' unknown TIME <time> RELEASE 720 COMPONENT NI (network interface) VERSION 40 RC -3 DETAIL NiErrSet COUNTER 2

Searching the community, as suggested in one of the blogs, I tried adding host name and IP address update the services and hosts file present in C:\Windows\System32\drivers\etc like SAPBackendHostName portNumber/tcp

I checked with the basis team for MSHOST details and it is fine. The same procedure works in a different machine, with the same JavaBE.ini file.

A quick help will be much appreciated.

Thanks.

Ashwin Venkatesh

[bill_froelich · Accepted solution]

Connect to message server failed indicates the host cannot connect for some reason. It could be a DNS issue, a routing issue, a firewall issue, etc. You will need to troubleshoot at that level first since you indicate the same JavaBE.ini works on another machine.

--Bill

[former_member400663 · Accepted solution]

Corporate Policies were blocking connections to server at Firewall level. Issue resolved with the help of Windows Security team.