Mailing List Archive

[Bug 64652] New: Occasional test failure at t/apache/expr_string.t at line 87
https://bz.apache.org/bugzilla/show_bug.cgi?id=64652

Bug ID: 64652
Summary: Occasional test failure at t/apache/expr_string.t at
line 87
Product: Apache httpd-2
Version: 2.4.43
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: All
Assignee: bugs@httpd.apache.org
Reporter: bryce@canonical.com
Target Milestone: ---

Ubuntu's CI has seen an irregularly recurring test failure:

t/apache/etags.t .................... ok
t/apache/expr.t ..................... ok
# Failed test 17 in t/apache/expr_string.t at line 87
t/apache/expr_string.t ..............
Failed 1/29 subtests
t/apache/getfile.t .................. ok

https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1890302
https://autopkgtest.ubuntu.com/packages/a/apache2/groovy/armhf

We have not been able to reproduce the issue on local hardware, only in CI. We
had attempted to add debug info to help isolate the cause, but with it added
the test case always passed.


It looks like Apache2 upstream also noticed this failure in the Apache2 CI:

http://mail-archives.apache.org/mod_mbox/httpd-dev/202001.mbox/%3C20200109141229.GA15490@redhat.com%3E
http://mail-archives.apache.org/mod_mbox/httpd-dev/202001.mbox/%3C20200113145056.GA12523%40redhat.com%3E
https://travis-ci.org/github/apache/httpd/jobs/633442262

This thread speculates it's a timing issue reading the error log too quickly,
and suggests adding a usleep() might work around the problem. I've applied
this change to Ubuntu to see if it passes our CI.

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