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https://issues.apache.org/jira/browse/STORM-270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13955593#comment-13955593
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Robert Joseph Evans commented on STORM-270:
-------------------------------------------
I have seen similar issues on startup of nimbus and the workers, but I never
had time to trace it down.
> Why ahead-of-time compiled clojure "classes" are not used in storm-core
> -----------------------------------------------------------------------
>
> Key: STORM-270
> URL: https://issues.apache.org/jira/browse/STORM-270
> Project: Apache Storm (Incubating)
> Issue Type: Question
> Reporter: Rafael Bagmanov
>
> Hi
> I do see that storm-core.jar contains both *.clj sources and clojure compiler
> generated *.class files. But in my observation in storm UI daemon, every
> request triggers some clj compilation on the-flight.
> This leads to:
> - high latency. (it takes about 5 seconds to fully load storm UI index page)
> - under very modest load (10 concurrent requests) index page rendering fails
> with exceptions for some requests:
> java.lang.RuntimeException: Unable to resolve symbol: nimbus in this context,
> compiling:(backtype/storm/ui/core.clj:1038)
> at clojure.lang.Compiler.analyze(Compiler.java:6281)
> at clojure.lang.Compiler.analyze(Compiler.java:6223)
> at clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3548)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6457)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyze(Compiler.java:6223)
> at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5618)
> at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:5919)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6455)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6443)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6443)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyze(Compiler.java:6223)
> at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5618)
> at clojure.lang.Compiler$FnMethod.parse(Compiler.java:5054)
> at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3674)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6453)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6443)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyze(Compiler.java:6223)
> at clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3548)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6457)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6443)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyze(Compiler.java:6223)
> at clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3548)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6457)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.access$100(Compiler.java:37)
> at clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:518)
> at clojure.lang.Compiler.analyzeSeq(Compiler.java:6455)
> at clojure.lang.Compiler.analyze(Compiler.java:6262)
> at clojure.lang.Compiler.analyze(Compiler.java:6223)
> at clojure.lang.Compiler.eval(Compiler.java:6515)
> at clojure.lang.Compiler.load(Compiler.java:6952)
> at clojure.lang.RT.loadResourceScript(RT.java:359)
> at clojure.lang.RT.loadResourceScript(RT.java:350)
> at clojure.lang.RT.load(RT.java:429)
> at clojure.lang.RT.load(RT.java:400)
> at clojure.core$load$fn__4890.invoke(core.clj:5415)
> at clojure.core$load.doInvoke(core.clj:5414)
> at clojure.lang.RestFn.invoke(RestFn.java:408)
> at clojure.core$load_one.invoke(core.clj:5227)
> at clojure.core$load_lib.doInvoke(core.clj:5264)
> at clojure.lang.RestFn.applyTo(RestFn.java:142)
> at clojure.core$apply.invoke(core.clj:603)
> at clojure.core$load_libs.doInvoke(core.clj:5298)
> at clojure.lang.RestFn.applyTo(RestFn.java:137)
> at clojure.core$apply.invoke(core.clj:603)
> at clojure.core$require.doInvoke(core.clj:5381)
> at clojure.lang.RestFn.invoke(RestFn.java:421)
> at ring.middleware.reload$wrap_reload$fn__7318.invoke(reload.clj:13)
> at backtype.storm.ui.core$catch_errors$fn__2082.invoke(core.clj:1075)
> at
> ring.middleware.keyword_params$wrap_keyword_params$fn__6327.invoke(keyword_params.clj:27)
> at
> ring.middleware.nested_params$wrap_nested_params$fn__6364.invoke(nested_params.clj:65)
> at ring.middleware.params$wrap_params$fn__6301.invoke(params.clj:55)
> at
> ring.middleware.multipart_params$wrap_multipart_params$fn__6390.invoke(multipart_params.clj:103)
> at ring.middleware.flash$wrap_flash$fn__6561.invoke(flash.clj:14)
> at ring.middleware.session$wrap_session$fn__6552.invoke(session.clj:43)
> at ring.middleware.cookies$wrap_cookies$fn__6489.invoke(cookies.clj:160)
> at ring.adapter.jetty$proxy_handler$fn__7252.invoke(jetty.clj:16)
> at
> ring.adapter.jetty.proxy$org.mortbay.jetty.handler.AbstractHandler$0.handle(Unknown
> Source)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> Caused by: java.lang.RuntimeException: Unable to resolve symbol: nimbus in
> this context
> at clojure.lang.Util.runtimeException(Util.java:170)
> at clojure.lang.Compiler.resolveIn(Compiler.java:6766)
> at clojure.lang.Compiler.resolve(Compiler.java:6710)
> at clojure.lang.Compiler.analyzeSymbol(Compiler.java:6671)
> at clojure.lang.Compiler.analyze(Compiler.java:6244)
> ... 74 more
> I'm not sure whether same compilation processes happen in other storm daemons.
> I've done experiments: after removing all clj files from the storm-core.jar,
> all issues described above disappeared: latency decreased to 800 ms, UI
> become able to handle 50 concurrent requests on the same machine.
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