MOBIN created ZEPPELIN-4521:
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Summary: jetty handle is slow
Key: ZEPPELIN-4521
URL: https://issues.apache.org/jira/browse/ZEPPELIN-4521
Project: Zeppelin
Issue Type: Bug
Components: zeppelin-server
Affects Versions: 0.8.0
Environment: linux
Reporter: MOBIN
Attachments: [jstack log]-LOCKED Thread.jpg, [jstack log]-refresh
notebook slow.jpg, [jstack log]-removeParagraph is slow.jpg, jpg1.jpg,
jpg2.jpg, jpg3.jpg
*Phenomenon:* User refreshes notebook and remover paragpah slowly
*Preliminary analysis:* Some user's interpreter has been constantly brushing
some error logs. When killing the user's spark task, zeppelin returns to
normal, but I think that no matter what spark task the user runs, it will not
affect at least zeppelin server, because the CPU and memory usage of the server
and zeppelin gc are normal
*Reason:* Checking and monitoring found that Jetty's hadler took a long time to
process the "/api/helium/suggest/" interface, such as jpg1.jpg
*Question:* I find that "/api/helium/suggest/" is called during the task's
start and operation. If I don't use a third-party helium plugin, can I not call
this interface? What exactly does this interface do? After I debug the source
code, I find that it does nothing
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