https://bz.apache.org/bugzilla/show_bug.cgi?id=60918
Bug ID: 60918
Summary: Process Send File releases the same Http11Processor in
two threads, leading to
java.lang.IllegalStateException: Unexpected state:
headers already parsed. Buffer not recycled?
Product: Tomcat 8
Version: 8.5.11
Hardware: PC
Status: NEW
Severity: major
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ----
Created attachment 34876
--> https://bz.apache.org/bugzilla/attachment.cgi?id=34876&action=edit
Some pieces of the full trace showing the issue
This is a similar report to
https://bz.apache.org/bugzilla/show_bug.cgi?id=58646 but whatever fix was done
in that case does not prevent this issue.
Basic outline:
1. thread http-nio-8080-exec-1 processes a request that will result in send
file. It pops Http11Processor@8dc1458 from recycledProcessors
2. The send file action is completed in thread http-nio-8080-ClientPoller-0.
Then that thread is done, it pushes Http11Processor@8dc1458 onto
recycledProcessors
3. A few milliseconds later, http-nio-8080-exec-1 also pushes
Http11Processor@8dc1458 onto recycledProcessors, so now that one processor is
in the list of recycledProcessors twice
4. Eventually, two nio exec threads both pop that one instance off of
recycledProcessors
4A. The second thread to use it throws
24-Mar-2017 12:08:08.093 INFO [http-nio-8080-exec-1]
org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request
header
Note: further occurrences of HTTP header parsing errors will be logged at
DEBUG level.
java.lang.IllegalStateException: Unexpected state: headers already parsed.
Buffer not recycled?
at
org.apache.coyote.http11.Http11InputBuffer.parseHeaders(Http11InputBuffer.java:554)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:683)
4B. The first thread, which completes after the second one, throws
24-Mar-2017 12:08:08.833 SEVERE [http-nio-8080-exec-7]
org.apache.coyote.http11.Http11Processor.service Error processing request
java.lang.NullPointerException
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:389)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
and then
24-Mar-2017 12:08:08.849 SEVERE [http-nio-8080-exec-7]
org.apache.coyote.http11.Http11Processor.endRequest Error finishing response
java.lang.NullPointerException
at
org.apache.coyote.http11.Http11OutputBuffer.commit(Http11OutputBuffer.java:351)
at
org.apache.coyote.http11.Http11Processor.prepareResponse(Http11Processor.java:1288)
at
org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:254)
at
org.apache.coyote.http11.Http11Processor.endRequest(Http11Processor.java:1457)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:823)
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