Worker appears to have hung

[PandathePanda]

Hi

I tried to update a few books, and calibre came back saying there was an error:

calibre, version 3.10.0 (linux2, embedded-python: True)
Failed to download metadata: Failed: Download metadata for 8 books

Starting job: Download metadata for 8 books
Job: "Download metadata for 8 books" failed with error:
Traceback (most recent call last):
File "site-packages/calibre/gui2/threaded_jobs.py", line 84, in start_work
File "site-packages/calibre/gui2/metadata/bulk_download.py", line 251, in download
File "site-packages/calibre/utils/ipc/simple_worker.py", line 227, in fork_job
File "site-packages/calibre/utils/ipc/simple_worker.py", line 105, in communicate
WorkerError: Worker appears to have hung

Called with args: ([26815L, 26813L, 26807L, 26806L, 26802L, 26801L, 26788L, 26786L], u'/home/pppirate/.cache/calibre_3.10.0_tmp_zJvdyP/xfbJ8W_metadata_bulk.log', <calibre.db.legacy.LibraryDatabase object at 0x7fb4b5059350>, True, True, None) {u'log': <calibre.utils.logging.GUILog object at 0x7fb421a4e210>, u'abort': <threading._Event object at 0x7fb421a4ebd0>, u'notifications': <Queue.Queue instance at 0x7fb4223885f0>}

not sure why it happened.

[kovidgoyal]

The worker process failed to start. Run calibre in debug mode and you may get some onformation about why, although it could be anything, from resource exhaustion to other software interfering.