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https://issues.apache.org/jira/browse/TIKA-3103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17112157#comment-17112157
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Radim Rehurek edited comment on TIKA-3103 at 5/20/20, 12:55 PM:
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Thanks for the quick response Tim.
> {{apache-tika-12291680472524021463.tmp}} looks like temp files that Tika
>creates. Can you tell which file type these are?
The input files are all XLSM and PDF. Not sure which relates to
`{{apache-tika-12291680472524021463` in particular.}}
> {{TIKA_streamstore_11144988934311367241.tmp}} does not look like a temp file
>from Tika.
I believe it is. Seems like a duplicate of
https://issues.apache.org/jira/browse/TIKA-2903
> On the zombie processes, in looking at the source code, we do have a timeout
> on tesseract at least, but, right, that won't trigger if the java process
> dies.
Aha. So the child timeout (default: two minutes) must be longer than the
Tesseract timeout (also two minutes by default) to avoid orphans. I reduced the
`org.apache.tika.parser.ocr.TesseractOCRParser.timeout` to 30 in
`tika-config.xml`, to prevent race conditions. Let's see if that helps.
> How often are you getting restarts of the child process?
I'm not sure. Where do I find out?
> Finally, to confirm, you do want tesseract to run, right?
Correct.
was (Author: piskvorky):
Thanks for the quick response Tim.
> {{apache-tika-12291680472524021463.tmp}} looks like temp files that Tika
>creates. Can you tell which file type these are?
The input files are all XLSM and PDF. Not sure which relates to
`{{apache-tika-12291680472524021463` in particular.}}
> {{TIKA_streamstore_11144988934311367241.tmp}} does not look like a temp file
>from Tika.
I believe it is. Seems like a duplicate of
https://issues.apache.org/jira/browse/TIKA-2903
> On the zombie processes, in looking at the source code, we do have a timeout
> on tesseract at least, but, right, that won't trigger if the java process
> dies.
Aha. So the child timeout (default: two minutes) must be longer than the
Tesseract timeout (also two minutes by default) to avoid zombies. I reduced the
`org.apache.tika.parser.ocr.TesseractOCRParser.timeout` to 30 in
`tika-config.xml`, to prevent race conditions. Let's see if that helps.
> How often are you getting restarts of the child process?
I'm not sure. Where do I find out?
> Finally, to confirm, you do want tesseract to run, right?
Correct.
> Tesseract fails to respect timeouts and clean up after itself
> -------------------------------------------------------------
>
> Key: TIKA-3103
> URL: https://issues.apache.org/jira/browse/TIKA-3103
> Project: Tika
> Issue Type: Bug
> Components: ocr
> Affects Versions: 1.24.1
> Reporter: Radim Rehurek
> Priority: Critical
>
> We're using the Tika Server with OCR:
> _java -jar /opt/tika/tika-server-1.24.1.jar -p 9998 -spawnChild -JXmx500m_
>
> Two undersirable things happen:
> h3. 1. The CPU runs at 100% for >10 minutes, long after any Tika requests
> should have finished.
> These processes show in _top_ as "tesseract" (OCR) and consume all CPU cores
> at 100%.
> They eventually die (or finish?) but the machine is unusable in the mean time.
> *Expected behaviour:* Tika cleans up spawned processes after itself: at most
> after its timeout limit (which is 2 minutes I believe?)
> h3. 2. The temp is full of files like:
> {{root@38acd588ee22:/# ll /tmp/}}
> {{total 197320}}
> {{drwxrwxrwt 1 root root 24576 May 20 09:35 ./}}
> {{drwxr-xr-x 1 root root 4096 May 20 08:40 ../}}
> {{-rw-r--r-- 1 root root 9273920 May 20 08:56
> TIKA_streamstore_11144988934311367241.tmp}}
> {{-rw-r--r-- 1 root root 8938048 May 20 08:57
> TIKA_streamstore_11649337406504198407.tmp}}
> {{-rw-r--r-- 1 root root 9478720 May 20 08:56
> TIKA_streamstore_13551529918743702933.tmp}}
> {{-rw-r--r-- 1 root root 9151040 May 20 08:57
> TIKA_streamstore_13568226047805501311.tmp}}
> {{-rw-r--r-- 1 root root 7701056 May 20 08:56
> TIKA_streamstore_13908373602714189455.tmp}}
> {{…}}
> {{-rw-r--r-- 1 root root 33367 May 20 08:55
> apache-tika-11167866320029165062.tmp}}
> {{-rw-r--r-- 1 root root 44353 May 20 08:54
> apache-tika-1152515137515755865.tmp}}
> {{-rw-r--r-- 1 root root 245279 May 20 08:52
> apache-tika-12106368488659105236.tmp}}
> {{-rw-r--r-- 1 root root 1759 May 20 08:47
> apache-tika-12291680472524021463.tmp}}
> {{…}}
>
> slowly filling up the disk.
> *Expected behaviour*: Tika cleans up disk space after itself.
>
> These bugs I critical for us. What's the best way to avoid these issues?
>
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