Salut,
Igor Minar wrote:
> Hi Alexey,
>
> On May 12, 2009, at 6:00 AM, Oleksiy Stashok wrote:
>
>> Hi Igor,
>>
>> thank you for trying that out.
>>
>> Those results look strange, I mean difference between sendfile and
>> regular Grizzly adapter.
>
> oh come on, you didn't expect grizzly to be better than
> grizzly-sendfile. or did you? ;-)
Hey hey we should eventually by merging your idea :)
>
>> Though, it could be caused by enormous number of exception logs, which
>> you observed.
>
> there weren't that many exceptions - I attached all of them to the
> previous email.
>
>> Most of them (may be all) are fixed on trunk, so if you'll have
>> chances to retry it again with latest sources - will appreciate that.
>
> The tests I ran yesterday evening (PT) were against the trunk. I can
> rerun the tests if you want me to, but I observed similar issues with
> 1.9.15
That's strange as the NPE was caused by the fix I did for your grizzly
send-file:
https://grizzly.dev.java.net/issues/show_bug.cgi?id=548
>>> SEVERE: Exception during controller processing
>>> java.lang.NullPointerException
>>> at
>>>
com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>>
com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>>
com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>>
com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
Thanks!
-- Jeanfrancois
>
> cheers,
> Igor
>
>>
>> Thank you.
>>
>> WBR,
>> Alexey.
>>
>> On May 12, 2009, at 9:18 , Igor Minar wrote:
>>
>>> Hi Alexey,
>>>
>>> On May 11, 2009, at 9:45 AM, Oleksiy Stashok wrote:
>>>
>>>> Hi Igor,
>>>>
>>>>>
>>>>> grizzly-sendfile-0.3-SNAPSHOT (the one used for tests) uses grizzly
>>>>> 1.9.15 not 1.0.x.
>>>> oh, didn't know that. Shame on me :)
>>>
>>> :-P
>>>
>>>>
>>>>> Is there more info/docs on aynchronous write queues?
>>>> http://blogs.sun.com/oleksiys/entry/grizzly_1_7_0_presents
>>>> we've changed API a little bit since that, but not much.
>>>
>>> That looks like an overkill for grizzly-sendfile since it's dealing
>>> with static data. However, I can imagine that something like this
>>> would be useful for dynamically generated responses (webapps). Also
>>> the results of my benchmarks of this feature in grizzly webserver are
>>> not significantly different than when it is turned off.. see below.
>>>
>>>>
>>>>
>>>>> btw I tried to run the same tests against glassfish v3b47 and it
>>>>> kept on getting into a state where after ~9min of testing it would
>>>>> start sending only partial responses or would refuse sending static
>>>>> files all together. I didn't have a lot of time to investigate (it
>>>>> took freaking forever to run all the tests I did), but I should run
>>>>> my tests against grizzly webserver to see if the problem repeats
>>>>> there.
>>>>
>>>>> There were two or three glassfish tests that passed and with
>>>>> threadcount of 50 and buffer size 81k (10x the default), I still
>>>>> saw that gf could achieve only 40-60% of grizzly-sendfile's
>>>>> throughput.
>>>> hmm. Ok, if you'll have any further results, please let us know.
>>>
>>> I built a simple grizzly webserver:
>>>
>>>
>>> GrizzlyWebServer ws = new GrizzlyWebServer(port, canonicalPath);
>>> ws.setMaxThreads(threadCount); //set to 50
>>> ws.getSelectorThread().setBufferSize(bufferSize); //set to 81000
>>> //optionally: ws.getSelectorThread().setAsyncHttpWriteEnabled(true);
>>> ws.start();
>>>
>>>
>>> and tested it with the same benchmark as grizzly-sendfile and this is
>>> what I got:
>>>
>>> 200 clients, not throttled:
>>>
>>> Type Success Failure
>>> Count Count
>>> 1KB Download 446 3
>>> 200KB Download 493 1
>>> 500KB Download 479 1
>>> 1MB Download 468 1
>>> 20MB Download 502 6
>>> 100MB Download 496 2
>>>
>>> total throughput: 104.200 MB/s (grizzly-sendfile's best: 208.59 MB/s
>>> && 0 failures)
>>>
>>>
>>> 200 clients, throttled at 1MB/s:
>>>
>>> Type Success Failure
>>> Count Count
>>> 1KB Download 20 158
>>> 200KB Download 20 185
>>> 500KB Download 13 163
>>> 1MB Download 21 170
>>> 20MB Download 17 167
>>> 100MB Download 16 178
>>>
>>> total throughput: 3.442 MB/s (grizzly-sendfile's best: 156.59 MB/s &&
>>> 0 failures)
>>>
>>> Most if not all of the failures were connection timeout exceptions
>>> (despite connection.setConnectTimeout(0); and
>>> connection.setReadTimeout(0); in my benchmark code) or connection
>>> reset by peer exceptions.
>>>
>>> I didn't notice any significant difference between
>>> AsyncHttpWriteEnabled on or off, which is quite surprising.
>>>
>>> The load test also uncovered a bunch of concurrency bugs - the stack
>>> traces are below.
>>>
>>> Am I doing something wrong?
>>>
>>> cheers,
>>> Igor
>>>
>>>
>>>
>>>
>>> May 11, 2009 10:37:24 PM com.sun.grizzly.http.SelectorThread$3
>>> onException
>>> SEVERE: Exception during controller processing
>>> java.nio.channels.CancelledKeyException
>>> at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55)
>>> at sun.nio.ch.SelectionKeyImpl.readyOps(SelectionKeyImpl.java:69)
>>> at
>>> sun.nio.ch.KQueueSelectorImpl.updateSelectedKeys(KQueueSelectorImpl.java:105)
>>>
>>> at
>>> sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:74)
>>> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
>>> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.select(TCPSelectorHandler.java:492)
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:183)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:37:24 PM com.sun.grizzly.SelectorHandlerRunner
>>> handleSelectException
>>> SEVERE: doSelect exception
>>> java.nio.channels.CancelledKeyException
>>> at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55)
>>> at sun.nio.ch.SelectionKeyImpl.readyOps(SelectionKeyImpl.java:69)
>>> at
>>> sun.nio.ch.KQueueSelectorImpl.updateSelectedKeys(KQueueSelectorImpl.java:105)
>>>
>>> at
>>> sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:74)
>>> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
>>> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.select(TCPSelectorHandler.java:492)
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:183)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:47:37 PM com.sun.grizzly.http.SelectorThread$3
>>> onException
>>> SEVERE: Exception during controller processing
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:47:37 PM com.sun.grizzly.SelectorHandlerRunner
>>> handleSelectException
>>> SEVERE: doSelect exception
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:51:56 PM com.sun.grizzly.http.ProcessorTask
>>> invokeAdapter
>>> SEVERE: HTTP Processing error
>>> java.nio.channels.ClosedChannelException
>>> at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:501)
>>> at
>>> com.sun.grizzly.http.SocketChannelOutputBuffer.sendFile(SocketChannelOutputBuffer.java:357)
>>>
>>> at
>>> com.sun.grizzly.tcp.StaticResourcesAdapter.service(StaticResourcesAdapter.java:217)
>>>
>>> at
>>> com.sun.grizzly.tcp.StaticResourcesAdapter.service(StaticResourcesAdapter.java:139)
>>>
>>> at
>>> com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:123)
>>>
>>> at
>>> com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:746)
>>> at
>>> com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:655)
>>> at
>>> com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:905)
>>> at
>>> com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:161)
>>>
>>> at
>>> com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:136)
>>>
>>> at
>>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:103)
>>>
>>> at
>>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:89)
>>>
>>> at
>>> com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
>>>
>>> at
>>> com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
>>>
>>> at
>>> com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
>>>
>>> at com.sun.grizzly.NIOContext.execute(NIOContext.java:510)
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.handleSelectedKey(SelectorHandlerRunner.java:356)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.handleSelectedKeys(SelectorHandlerRunner.java:256)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:193)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:54:19 PM com.sun.grizzly.http.SelectorThread$3
>>> onException
>>> SEVERE: Exception during controller processing
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:54:19 PM com.sun.grizzly.SelectorHandlerRunner
>>> handleSelectException
>>> SEVERE: doSelect exception
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:56:10 PM com.sun.grizzly.http.SelectorThread$3
>>> onException
>>> SEVERE: Exception during controller processing
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:56:10 PM com.sun.grizzly.SelectorHandlerRunner
>>> handleSelectException
>>> SEVERE: doSelect exception
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:56:10 PM com.sun.grizzly.http.SelectorThread$3
>>> onException
>>> SEVERE: Exception during controller processing
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:56:10 PM com.sun.grizzly.SelectorHandlerRunner
>>> handleSelectException
>>> SEVERE: doSelect exception
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:57:06 PM com.sun.grizzly.http.SelectorThread$3
>>> onException
>>> SEVERE: Exception during controller processing
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:57:06 PM com.sun.grizzly.SelectorHandlerRunner
>>> handleSelectException
>>> SEVERE: doSelect exception
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:59:18 PM com.sun.grizzly.http.SelectorThread$3
>>> onException
>>> SEVERE: Exception during controller processing
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>> May 11, 2009 10:59:18 PM com.sun.grizzly.SelectorHandlerRunner
>>> handleSelectException
>>> SEVERE: doSelect exception
>>> java.lang.NullPointerException
>>> at
>>> com.sun.grizzly.http.SelectorThreadKeyHandler.doRegisterKey(SelectorThreadKeyHandler.java:86)
>>>
>>> at
>>> com.sun.grizzly.DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:133)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:445)
>>>
>>> at
>>> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:370)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:181)
>>>
>>> at
>>> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:128)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>
>>> at java.lang.Thread.run(Thread.java:637)
>>>
>>>
>>>
>>>>
>>>>
>>>> Thank you.
>>>>
>>>> WBR,
>>>> Alexey.
>>>>
>>>>>
>>>>> On May 11, 2009, at 2:02 AM, Oleksiy Stashok wrote:
>>>>>
>>>>>> Hi Igor,
>>>>>>
>>>>>> that's great blog and great observations.
>>>>>> It could be interesting to check one more strategy here:
>>>>>> asynchronous write queues. Unfortunately we don't have
>>>>>> implementation of one for Grizzly 1.0.x.
>>>>>> Unlike ENBA, asynchronous write queue first tries to write buffer
>>>>>> immediately, and only if it's not able to write whole buffer - it
>>>>>> registers for async. write (using the same selector, not new one).
>>>>>>
>>>>>> IMHO this approach could work better than ENBA, because, we will
>>>>>> be able to avoid selector/thread switches.
>>>>>>
>>>>>> Thank you!
>>>>>>
>>>>>> WBR,
>>>>>> Alexey.
>>>>>>
>>>>>> On May 11, 2009, at 4:17 , Igor Minar wrote:
>>>>>>
>>>>>>> I was hoping to post this sooner, but came across some *very*
>>>>>>> surprising results that I had to thoroughly validate - the
>>>>>>> blocking IO can scale!
>>>>>>>
>>>>>>> http://blog.igorminar.com/2009/05/grizzly-sendfile-and-comparison-of.html
>>>>>>>
>>>>>>>
>>>>>>> Let me know what you think, not very many people do multiplexed
>>>>>>> blocking IO and I think that it is an area that has a lot of
>>>>>>> potential and deserves more research.
>>>>>>>
>>>>>>> cheers,
>>>>>>> Igor
>>>>>>>
>>>>>>> ---------------------------------------------------------------------
>>>>>>>
>>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>>>>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>>>>>
>>>>>>
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>>>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>>>>
>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>>>
>>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>
>>
>>
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