Valentin Valchev created FELIX-3965:
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Summary: threads configuration status generates invalid results
Key: FELIX-3965
URL: https://issues.apache.org/jira/browse/FELIX-3965
Project: Felix
Issue Type: Bug
Components: Web Console
Affects Versions: webconsole-4.0.0
Reporter: Valentin Valchev
Assignee: Valentin Valchev
I'm quite surprised, that nobody noticed that "Threads" tab in Configuration
Status generates invalid result.
There are two problems:
1. The number of reported threads in the status is incorrect.
The reason is that we are enumerating all threads in all thread groups. However
in some JVMs enumerating the root thread group will return *all* threads. So we
count the threads at least twice - once being enumerated from the root group,
and once - from their own thread group.
2. Some threads are not printed at all.
Our comparators doesn't guarantee that the null elements in the array will
always get at the end of the array. So occasionally we can get a sorted array
with nulls in front. Then, if we print one the first N (the actual thread
count) from the array. Nulls are skipped, but the counter is increased, so
finally some threads remain unprinted.
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