Thread delay in ApplicationHandler.handle() method

https://github.com/jersey/jersey/blob/5140ca13c57b4818600b79361c2f3347d934e8a7/core-server/src/main/java/org/glassfish/jersey/server/ApplicationHandler.java#L702

Issue was seen on Jersey 2.17, Some of the threads takes longer time to respond in this method, time delay caused by this is measured from newRelic tool and it was amounting to 11 Sec. But same request also completed with in 3 sec (complete request). We were unable to find the RC for this.

Issue happened in load testing scenario, but single user request and response time seems to be good, issue is in-consistent.



Start with core-server/src/main/java/org/glassfish/jersey/server/ApplicationHandler.java at the linked line around 702, then investigate the inconsistent delay under load rather than single-user requests. Use the reported New Relic timings and load-testing scenario to compare slow and fast requests. Done means identifying the cause of the thread delay and documenting or correcting it with evidence from a reproducible test.

Written by the indexing model from the issue text.