Jerry Cwiklik created UIMA-5640:
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Summary: UIMA-DUCC: JP/Service wrapper should not sleep when Work
Item is not available
Key: UIMA-5640
URL: https://issues.apache.org/jira/browse/UIMA-5640
Project: UIMA
Issue Type: Improvement
Components: DUCC
Reporter: Jerry Cwiklik
Assignee: Jerry Cwiklik
Fix For: 2.2.2-Ducc
Currently when JD/Protocol Handler runs out of work it returns null back in
response to GET. In this case, the service wrapper sleeps for a fixed amount of
time and tries again. The sleeping should be done in the client (JD/Protocol
Handler) to reduce latency. Instead of waiting for a fixed amount of time, the
client code can use notification/interrupt to wake up a sleeping GET thread
when a new work items becomes available. The service wrapper will block in http
get request until a reply comes or the get request times out. On timeout, the
service will immediately call the client (JD/Protocol Handler).
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