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Observation¶

We saw the following error on o3 today:

[2022-12-05T10:45:55.571462Z] [error] [JBm0Hyi1i4oq] Can't open file
"/var/lib/openqa/testresults/01371/01371619-opensuse-Jump:15.2-DVD-ppc64le-Build39.13-extra_tests_in_textmode@ppc64le/
details-gd.json": No such file or directory at /usr/share/openqa/script/../lib/OpenQA/Schema/Result/JobModules.pm line
95.

It seems like the test got deleted because we have this in the access log:

[05/Dec/2022:10:45:50 +0000] "GET /tests/1371619 HTTP/1.1" 200

So the test was still there but when loading results it was already deleted, because now it returns a 404.

The according code is

 93     return {} unless -r (my $file = path($dir, "details-$name.json"));
 94 
 95     my $json_data = $file->slurp;
 96     die qq{Malformed JSON file "$file": $@} unless my $json = eval { decode_json($json_data) };

so not an atomic operation.

Acceptance criteria¶

• AC1: A unit test ensures that a not readable test module result file is handled and gracefully returned to the web UI and no error in log
• AC2: The handling is atomic, not "check if readable and then read"

Suggestions¶

• Instead of trying to read and then fail we should handle the read attempt as we handle the exception in line 96 and return {} in case of error