Re: Test statistics concurrent modification exception
I've opened bug 1808854 and made a speculative fix
(http://grinder.svn.sourceforge.net/viewvc/grinder?view=rev&revision=3526).
Please try the attached patch and let me know whether it works for you.
Just add the jar file to your CLASSPATH before grinder.jar.
Thanks,
- Phil
sys@... wrote:
> Hi,
>
> I'm getting ConcurrentModificationException on the statistics map for
> large (> ~20) thread counts; at almost every run when the thread count
> is 100.
>
> I'm testing on a single host, 1 grinder process, 1 run, 1 script
> (below). Grinder version 3.0-beta33. Java version 1.6.0_02, Win32
> (Windows XP SP2).
>
> What's the best way to fix this? :)
>
> Best regards,
> /Oshadi
>
> Here's the stack (the "Request succeeded" messages are emitted by the
> test script):
>
> 04.10.07 14:53:56 (thread 3 run 0 test 30): Request succeeded
> 04.10.07 14:53:56 (thread 7 run 0 test 35): Request succeeded
> Exception in thread "Timer-0" java.util.ConcurrentModificationException
> at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown
> Source)
> at java.util.TreeMap$EntryIterator.next(Unknown Source)
> at java.util.TreeMap$EntryIterator.next(Unknown Source)
> at
> net.grinder.statistics.TestStatisticsMap$Iterator.next(TestStatisticsMap.java:390)
> at
> net.grinder.statistics.TestStatisticsMap$ForEach.iterate(TestStatisticsMap.java:442)
> at
> net.grinder.statistics.TestStatisticsMap.reset(TestStatisticsMap.java:151)
> at
> net.grinder.engine.process.GrinderProcess$ReportToConsoleTimerTask.run(GrinderProcess.java:385)
> at java.util.TimerThread.mainLoop(Unknown Source)
> at java.util.TimerThread.run(Unknown Source)
> 04.10.07 14:53:56 (thread 2 run 0 test 22): Request succeeded
> 04.10.07 14:53:56 (process 425-6000-0): finished
>
>
> And here's the script:
>
> from projectname import mk_request
> from net.grinder.script.Grinder import grinder
> from net.grinder.script import Test
> from net.grinder.plugin.http import HTTPRequest
> from net.grinder.common import GrinderException
>
> log = grinder.logger.output
> stdout = grinder.logger.TERMINAL
> logfile = grinder.logger.LOG
> fngen = grinder.filenameFactory
>
> HOST = "http://localhost:8080"
> SERVICE = "/path/to/servlet/in/TomCat"
> REQUEST_NO = 1
>
> #
> # Input: a python dictionary and perhaps a URL
> # Output: The response from the server, a JSON structure as a string
> #
> def run_request(json, service=HOST+SERVICE):
> global REQUEST_NO
>
> testid = "m=%s,c=%s,s=%s,c2=%s" %
> (json['hdr']['m'], \
> json['hdr']['c'], \
> json['hdr']['s'], \
> json['hdr']['c2'])
> thistest = Test(REQUEST_NO, testid)
> log(str(json), logfile)
> httprequest = thistest.wrap(HTTPRequest())
> httpresp = httprequest.POST(service, str(json))
> log(httpresp.getText(), logfile)
>
> REQUEST_NO += 1
> return httpresp.getText()
>
>
> def assert_resp(json_str, tocheck):
> if json_str.find(tocheck) == -1:
> return 0
> return 1
>
> #
> # run a request, and an assertion on the response too
> # returns success==1/failure==0
> #
> def assert_request(json, check, service=HOST+SERVICE):
> json_resp = run_request(json, service)
> status = assert_resp(json_resp, check)
> if not status:
> log("Request FAILED", logfile)
> log("Request FAILED", stdout)
> else:
> log("Request succeeded", stdout)
> return status
>
> #
> # __call__
> #
> def run_test():
> run_request(mk_request(m='start'))
> assert_request(mk_request(m='buy', \
> p='0000000000003', \
> p2='000000003'), "BUYBUYBUY")
> assert_request(mk_request(m='pay', p='666',
> p2='000000003', \
> t='200'), "PAYPAYPAY")
>
> def TestRunner():
> return run_test
>
>
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