topic Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error messag in All Apps and Add-ons

Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

hoodaajay1 — Fri, 03 Mar 2017 16:37:06 GMT

I have installed Splunk 6.5.2 enterprise and installed the Splunk DB Connect 3.0 app from the tgz file. When I logon to Splunk and go to Splunk DB Connect, I get an error message at the top that says, 'Can not communicate with task server, check your settings'. I have tried changing the Task server port but that did not help.

Any suggestions/solutions would help.

Thanks

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

jcoates_splunk — Fri, 03 Mar 2017 17:11:48 GMT

http://docs.splunk.com/Documentation/DBX/3.0.1/DeployDBX/Troubleshooting#DB_Connect_logging

what's the error message?

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

hoodaajay1 — Tue, 29 Sep 2020 13:07:51 GMT

This was the error message.
Can not communicate with task server, check your settings

From the Settings screen on the webui for Db Connect I was not able to change the task server port as after the start it tries to restart the task server & it was failing.

I changed the port setting in this file from 9998 to 1025 & restarted Splunk from services, it worked for me.
C:\Program Files\Splunk\etc\apps\splunk_app_db_connect\default\dbx_task_server.yml
server:
rootPath: /api/
applicationConnectors:
- type: https
port: 1025

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

mikkorh — Tue, 14 Mar 2017 08:38:18 GMT

Hoodaajay1, your answer fixed the same error situation also in my case. Haven't yet tested this DB Connect 3 in linux but at least in windows installation it works and looks like it survives at least one reboot.

Thank you!

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

vsilchev — Wed, 15 Mar 2017 10:12:46 GMT

Search index=_internal sourcetype="dbx*" error gives me events like this:

2017-03-15 13:58:05.813 +0400 3764@TestWin2012 [main] ERROR io.dropwizard.cli.ServerCommand - Unable to start server, shutting down
java.lang.RuntimeException: java.net.BindException: Address already in use: bind
    at org.eclipse.jetty.setuid.SetUIDListener.lifeCycleStarting(SetUIDListener.java:213)
    ...

So, it seems like DB Connect cannot start task server using port 9998 because this port number is already occupied.

Changing port setting actually solves the problem. However, it is still unclear what could cause it. For me this problem appeared right after I upgraded DB Connect from 2.4 to 3.0.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

mikkorh — Wed, 15 Mar 2017 10:19:20 GMT

Yes that's the only reason why DB Connect cannot occupy the port if something else is already listening there. Nothing should be listening in that port unless configured unless Splunk for some reason reserves that port for what ever reason (SSL?) by default. I think it's a 'feature' which has slipped through QA fingers.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

roopeshiiitm — Mon, 03 Apr 2017 18:43:13 GMT

Error : Task Server not started

first we keep port 1025 (or 1030) any port save it this will still not working
restart splunk

we can see splunk db connect working fine , go to configuration you will see its using the port which
we have given like 1025 in our case

now we can change port again to 9998 , save and task server working fine

done ,first we keep port 1025 (or 1030 any port ) save , this will still show task server not started
now

restart splunk

we found its working now , however port is what we have given , like 1025 in our case

now we can change port again to 9998 , and can see task server working fine

Done

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

altink — Tue, 27 Mar 2018 11:59:23 GMT

I did the change to 1025 - it didn't work. and I turned it again to 9998 - same result.
In both cases, when I start Splunk I have the following output:

[splunk@srvsplunk bin]$ ./splunk start

 Splunk> CSI: Logfiles.

 Checking prerequisites...
     Checking http port [8000]: open
     Checking mgmt port [8089]: open
     Checking appserver port [127.0.0.1:8065]: open
     Checking kvstore port [8191]: open
     Checking configuration...  Done.
     Checking critical directories...    Done
     Checking indexes...
         Validated: _audit _internal _introspection _telemetry _thefishbucket history main omega_ca_nt omega_ds omega_ds_idx_01 omega_nt_ora summary
     Done
     Checking filesystem compatibility...  Done
     Checking conf files for problems...
         Invalid key in stanza [dbx_java_installation_health_check] in /opt/splunk/etc/apps/splunk_app_db_connect/default/checklist.conf, line 17: doc_title  (value:  DB Connect JVM installation).
         Invalid key in stanza [dbx_driver_installation_health_check] in /opt/splunk/etc/apps/splunk_app_db_connect/default/checklist.conf, line 41: doc_title  (value:  DB Connect JDBC Driver installation).
         Invalid key in stanza [dbx_connections_configuration_health_check] in /opt/splunk/etc/apps/splunk_app_db_connect/default/checklist.conf, line 69: doc_title  (value:  DB Connect connection configuration,DB Connect identity configuration).
         Invalid key in stanza [dbx_data_lab_configuration_health_check] in /opt/splunk/etc/apps/splunk_app_db_connect/default/checklist.conf, line 85: doc_title  (value:  DB Connect input configuration,DB Connect output configuration,DB Connect lookup configuration).
         Invalid key in stanza [dbx_java_server_configuration_health_check] in /opt/splunk/etc/apps/splunk_app_db_connect/default/checklist.conf, line 98: doc_title  (value:  DB Connect Java Server configuration).
         Your indexes and inputs configurations are not internally consistent. For more information, run 'splunk btool check --debug'
     Done
     Checking default conf files for edits...
     Validating installed files against hashes from '/opt/splunk/splunk-6.5.2-67571ef4b87d-linux-2.6-x86_64-manifest'
     All installed files intact.
     Done
 All preliminary checks passed.

 Starting splunk server daemon (splunkd)...  
 Done
  [  OK  ]

 Waiting for web server at http://127.0.0.1:8000 to be available........ Done


 If you get stuck, we're here to help.  
 Look for answers here: http://docs.splunk.com

 The Splunk web interface is at http://srvsplunk:8000

the very strange thing on the above - is that the startup problems DO NOT appear with the 9998 port as an original setting after the DB Connect App Install, but they DO appear even when the port is set again to 9998 (after trying 1025).

regards
Altin

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

jayanath — Mon, 18 Jun 2018 01:39:46 GMT

I had the same problem and search using index=_internal sourcetype="dbx"* gave out the real error which was a permission issue.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

rogue_carrot — Thu, 02 Aug 2018 20:07:56 GMT

Yes, If I change the port number and restart splunk it seems to work! Thank-you for the helpful answer.

./splunk restart

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

kmower — Tue, 29 Sep 2020 21:00:07 GMT

I have this same error on a Windows install. However, I don't have this file at all

C:\Program Files\Splunk\etc\apps\splunk_app_db_connect\default\dbx_task_server.yml

As far as the 'dbx' prefix is concerned I only have dbx_logging and dbx_settings in my C:\Splunk\etc\apps\splunk_app_db_connect\default folder ... this thread is 6.5.3 though, and I am running Splunk 7.1.2 - same error though folks, but no file as referenced here.

Any idea how to fix this? Thanks.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

niketn — Tue, 28 Aug 2018 17:31:19 GMT

Look for the following path:

$SPLUNK_HOME\splunk_app_db_connect\config\dbx_task_server.yml

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

kmower — Tue, 28 Aug 2018 21:42:48 GMT

Thanks. You mean JAVA_HOME in that file, or something else? Thanks again, I really appreciate it.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

kmower — Tue, 29 Sep 2020 21:02:57 GMT

The top of my dbx_task_server.yml reads:

server:
rootPath: /api/
applicationConnectors:
- type: http
port: 9998

I can't find any /api/ path in the Splunk directories. Perhaps this is the issue?

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

dkretzmer — Mon, 17 Sep 2018 18:22:11 GMT

I got this error as well because the java jre path was removed or changed. The Java on my standalone dev Splunk server got updated by our SysAdmins and I was getting the "Can not communicate with task server, check your settings" error. It had been working just fine.
I went to settings and reviewed them. I verified the java path with what was on the server and sure enough the old java path was gone. I updated the java path to the new java path and saved. It attempted the restart of the task server but failed. I restarted splunk and everything came up working like normal.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

yliang_splunk — Tue, 29 Sep 2020 22:22:23 GMT

I got the same error for dbx 3.1.4 for splunk 7.1.4 and splunk 6.6.11 in Windows. I installed the brand new splunk and copy paste my old splunk_app_db_connect folder to the splunk/etc/apps/ to 'install' the app. I restart splunk and got the same error message.

My solution is to refresh the Settings under Configuration tab in dbx app. You may need to change the JRE Installation Path by one letter and change it back. Then you click the save on the right. The task server will restart. After a few seconds, it will say task server restart successfully. Then you are ready to go! I didn't change any of the setting but just trigger the refresh task server.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

splunkreal — Thu, 04 Apr 2019 09:23:05 GMT

Using port 1025 solved, thanks guys 🙂

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

kmower — Tue, 29 Sep 2020 23:57:33 GMT

I have uninstalled DB connect completely, and then made sure I had JAVA_HOME set properly to the jre 8 path as well as adding %JAVA_HOME%/bin to the Path. Then I installed DB Connect and it worked. I read this somewhere (sorry probably on answers but I forget the link). But it seems to be essential that JAVA_HOME set along with the reference in the path before installing DB Connect.

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

kacel — Fri, 24 May 2019 09:10:28 GMT

its works for me thank u .

Re: Splunk DB Connect: How to resolve "Can not communicate with task server, check your settings" error message?

dhihoriya_splun — Wed, 30 Sep 2020 00:44:24 GMT

There is one file in DBconnect app which is used to configure app:
/opt/splunk/etc/apps/splunk_app_db_connect/config/dbx_task_server.yml

There is one stanza in inputs.conf in app's default folder which is used this above file to configure app (including port 9998 for JAVA) so if the inputs are disabled in the app then the app will not able to get the file "/opt/splunk/etc/apps/splunk_app_db_connect/config/dbx_task_server.yml" and it will show the error "Can not communicate with task server, check your settings".

Below is the stanza in inputs.conf:

[server://default]
config_file = ${SPLUNK_HOME}/etc/apps/splunk_app_db_connect/config/dbx_task_server.yml
interval = 5
keystore_password = *****
start_by_shell = false

It may be issue with the inputs of DBconnect app.
I have tested above steps and it works fine that by enabling the inputs issue has been resolved.