We are trying to enable job-splitting and merging on our Galaxy blast tools. We set the following parameters in the universe_wsgi.ini:

use_tasked_jobs = True
local_task_queue_workers = 2

Then we executed the tool "NCBI BLAST+ blastn" (from devteam's NCBI BLAST+) on a query set of 10,000 sequences. The tool's xml has the following parallelism tag:

And as expected, the job was split into 10 tasks (IDs 0-9), each one with 1000 sequences. Four tasks started running simultaneously.

Those four tasks have completed, but now there is no indication that the other 6 tasks have begun running, and the job on the GUI is still in the yellow-state in History.

It has been nearly an hour, and still no sign of those tasks or any job running. What could be the cause of this?

Ravi Sanka
ICS Sr. Bioinformatics Engineer
J. Craig Venter Institute