WARN - liquibase.resource.null .. too many open files

Stefan Hall shared this problem 16 months ago
Defect Logged

Hi,

we see in catalina.yyyy-mm-dd.logs more often quite a lot of exceptions for liquibase - too many open file. Our server side limit for "open files" is 63536, so this should not be a problem.


You can find many of these messages on the internet and almost always it is related to the used liquibase version. In which version it was actually fixed, I could not find out so fast.


Do you know this problem and are you looking for a solution? We use v9.8.0.1


Log extract

WARN [main] liquibase.resource.null Cannot create filesystem for url file:/opt/tc/yellowfin/webapps/yellowfin/WEB-INF/lib/xmlgraphics-commons-2.6. /opt/tc/yellowfin/webapps/yellowfin/WEB-INF/lib/xmlgraphics-commons-2.6. too many open files
java.nio.file.FileSystemException: /opt/tc/yellowfin/webapps/yellowfin/WEB-INF/lib/xmlgraphics-commons-2.6. too many open files

;) Stefan


Best Answer
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This does seem to be an issue with the Liquibase version currently shipping with Yellowfin and was identified and subsequently fixed in Liquibase 4.5.0: https://github.com/liquibase/liquibase/issues/1815

The Liquibase library is due to be updated to 4.8 in Yellowfin 9.9, so that should put an end to these messages.

Kind regards,

Chris

Replies (2)

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2

In our case, we also got these liquibase errors but were able to fix them by setting the hard and soft limits in /etc/security/limits.conf for the <user> under which the server runs:

<user> hard nofile 65536
<user> soft nofile 32768
worked with us.


By checking

su - <user> -c "ulimit -Hn"
we found out that the limit was too low.

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1

Hi Stefan,

It does seem to be Linux related. I see you've set a limit for open files, does your limits.conf file have entries for both the hard nofile and soft, as mentioned in Gerhard's solution?

Kind regards,

Chris

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1

Hi Chris,

yes, hard and soft limit for "open files" is set to 63536

;) Stefan

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1

This does seem to be an issue with the Liquibase version currently shipping with Yellowfin and was identified and subsequently fixed in Liquibase 4.5.0: https://github.com/liquibase/liquibase/issues/1815

The Liquibase library is due to be updated to 4.8 in Yellowfin 9.9, so that should put an end to these messages.

Kind regards,

Chris

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1

HI Chris,

sounds good. Do you know when the new version 9.9 will be released? I have not read anything about this yet.

;) Stefan

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1

Hi Stefan,

No worries. I don't have an official date for 9.9 but it should be coming soon. Apologies that I can't give you a more accurate estimate at this time, but as soon as I found out I'll let you know.

Kind regards,

Chris

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1

Hi Chris,

No problem, I'll just wait a little longer.

Can you mark this thread as error until then? Then I keep an eye on it and do not lose the overview. Are already unusually many errors, / problems that I have found.

;) Stefan

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1

Hi Stefan,

Sure, I'll do that. There's some internal discussion on pushing this back to the next patch so it might not come in for 9.9. I'll keep you updated.

Kind regards,

Chris

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