Qlik Task Unavailability Post Qlik disaster recovery

[Visa_Aaron_Xing]

Environment Details:

• Qlik Environment:

  • Operating System: Windows Server 2022
  • Qlik Version: 2024.5.0.144

• Data Source Environment:

  • Database: SQL Server
  • SQL Server Version: 2019
  • Operating System: Windows Server 2019

Issue Description:

We are encountering an issue following the recovery process of disaster recovery by moving the file to a different Qlik server.

Steps Followed:

1. Stopped both active Qlik_SERVER_1 and passive Qlik_SERVER_2 Qlik servers.
2. Stopped any running tasks (60+ tasks).
3. Performed Qlik disaster recovery by moving the file from Qlik_SERVER_1 to Qlik_SERVER_2.
4. Started Qlik services successfully on Qlik_SERVER_2.
5. Attempted to start the Qlik tasks on the new active Qlik_SERVER_2.
6. Sometimes the Qlik tasks cannot start with any of the options (Normal Resume, Reload, Reprocess with X LSN).

Additional Observations:

• After stopping the Windows process of each Qlik task, we can restart them successfully, but only 2-5 tasks together at a time.

Error Message:

Upon changing the log level to trace, the following error messages were observed:

00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: rootPath=<f:\mware\Attunity\Replicate\data\logs>, addPath=<f:\mware\Attunity\Replicate\data\logs> (at_dir.c:1014)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result before canonize=<f:\mware\Attunity\Replicate\data\logs\clean_old_logs.bat> (at_dir.c:1025)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result=<f:\mware\Attunity\Replicate\data\logs\clean_old_logs.bat> (at_dir.c:1031)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: rootPath=<f:\mware\Attunity\Replicate\data\logs>, addPath=<f:\mware\Attunity\Replicate\data\logs> (at_dir.c:1014)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result before canonize=<f:\mware\Attunity\Replicate\data\logs\reptask_UNI-SRC-FSHD-01-TGT-FRPT-UV.log> (at_dir.c:1025)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result=<f:\mware\Attunity\Replicate\data\logs\reptask_UNI-SRC-FSHD-01-TGT-FRPT-UV.log> (at_dir.c:1031)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: rootPath=<null>, addPath=<null> (at_dir.c:1014)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result before canonize=<F:\mware\Attunity\Replicate\data\logs\reptask_UNI-SRC-FSHD-01-TGT-FRPT-UV.log> (at_dir.c:1025)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result=<F:\mware\Attunity\Replicate\data\logs\reptask_UNI-SRC-FSHD-01-TGT-FRPT-UV.log> (at_dir.c:1031)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: rootPath=<f:\mware\Attunity\Replicate\data\logs>, addPath=<f:\mware\Attunity\Replicate\data\logs> (at_dir.c:1014)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result before canonize=<f:\mware\Attunity\Replicate\data\logs\reptask_UNI-SRC-FSHD-01-TGT-FRPT-UV__250210163435.log> (at_dir.c:1025)
00002188: 2025-02-10T16:34:35:924215 [IO ]V: combine_path: result=<f:\mware\Attunity\Replicate\data\logs\reptask_UNI-SRC-FSHD-01-TGT-FRPT-UV__250210163435.log> (at_dir.c:1031)
00002188: 2025-02-10T16:34:35:924215 [INFRASTRUCTURE ]I: Crypto mode: Standard. (at_logger.c:1573)
00002188: 2025-02-10T16:34:35:924215 [INFRASTRUCTURE ]V: thread allocation for converter <0> (at_text.c:725)
00002188: 2025-02-10T16:34:35:924215 [INFRASTRUCTURE ]V: cloning converter, cd 0 (at_text.c:581)
00002188: 2025-02-10T16:34:38:925173 [IO ]T: rep_net_server_select: Server poll timeout. failed (at_repnet.c:489)
00002188: 2025-02-10T16:34:38:925173 [IO ]V: rep_net_server_select:489: Failed (at_repnet.c:550)
00002188: 2025-02-10T16:34:41:925582 [IO ]T: rep_net_server_select: Server poll timeout. failed (at_repnet.c:489)
00002188: 2025-02-10T16:34:41:925582 [IO ]V: rep_net_server_select:489: Failed (at_repnet.c:550)

Request for Assistance:

We seek assistance in diagnosing and resolving the following:

• Understanding why Qlik tasks are not available after the recovery process.
• Steps to make the tasks available for startup without manually stopping the Windows process of each task.
• Any necessary configurations or checks that we might have missed during the recovery process.

Additional Information:

• Environment details (OS, Qlik, and SQL Server versions).
• Error messages from the trace log (as provided above).

We appreciate your prompt assistance in resolving this issue.

[Dana_Baldwin]

Hi @Visa_Aaron_Xing 

Is Replicate installed in a fail over cluster as described in the User Guide sections here?: Setting up Qlik Replicate in a cluster environment #Setting up Qlik Replicate in a cluster environme...

If so, the operating system handles stopping the tasks & services and moving the resources to the other node.

Please attach one of the task logs from a task that will not start. If you are not comfortable posting that in a public forum, please open a support case.

Thanks,

Dana

[Visa_Aaron_Xing]

Thank you, Dana, for reply! I did created support case