https://bz.apache.org/bugzilla/show_bug.cgi?id=66202
Bug ID: 66202
Summary: Need different group of worker thread to process the
request
Product: Tomcat 9
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: major
Priority: P2
Component: Connectors
Assignee: dev@tomcat.apache.org
Reporter: iih...@qq.com
Target Milestone: -----
Perhaps this can be considered as a Feature instead of a bug.
The scenario is in the Cloud Foundry platform.
The healthcheck endpoint "/manage/info" is the same with the other all user
business endpoint even if they are registered with different priority.
When the business endpoint has a long time response and the server is in a high
concurrency, the the healthcheck endpoint will lose the chance to respond in
time because all the worker thread is busy on long processing of the other
endpoint.
Finally CF container will crash with OOM (137).
One important reason is that all the endponts are processed in the same group
of worker thread.
My thinking is that, whether tomcat can provide at least 2 groups of worker
thread to work on different group of endpoints.
thus the internal group of worker thread which processes healthcheck will never
be blocked and this can ensure the server is alive.
BR,
Sean
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