On 13/01/2022 21:45, Doug Whitfield wrote:
Hi Mark,
In the newly opened bug report about this
(https://bz.apache.org/bugzilla/show_bug.cgi?id=65773), you noted that logging
at level FINE would show what is happening.
What exactly are we looking at when it says it “Swallowed [0] bytes”? I can get
more data, but at this point, I just want to understand the log sample:
Time: 2022-01-12 03:44:42.895, Level: FINE, Logger:
org.apache.coyote.http2.Http2Parser
org.apache.coyote.http2.Http2Parser swallow
- Connection [54], Stream [2076417], Swallowed [0] bytes
It means that for some reason Tomcat needed to swallow some or all of
the payload for a frame and in this instance the payload was empty.
Possible reasons for swallowing (ignoring) the payload include:
- an error exception has occurred and the payload won't be processed
- padding flag has been set (frames can have zero length padding)
- the frame is of an unknown type
If you look further back in the debug trace for that stream the previous
messages should identify which this is.
Mark
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