Hi Bruce, Thanks for the reporting this new issue. I've entered a formal report:
"NPE during NIO SelectableChannel.register" http://restlet.tigris.org/issues/show_bug.cgi?id=603 As it looks like a JVM bug, it would be very useful if you could indicate your OS, JVM version on the report. Best regards, Jérôme Louvel -- Restlet ~ Founder and Lead developer ~ http://www.restlet.org Noelios Technologies ~ Co-founder ~ http://www.noelios.com -----Message d'origine----- De : news [mailto:[EMAIL PROTECTED] De la part de Bruce Lee Envoyé : vendredi 26 septembre 2008 18:39 À : [email protected] Objet : Re: Random Grizzly IOException Hi Jerome, I downloaded the Restlet 1.1 RC2 and although it seems to be much better than before, under running the test with Jmeter, there is still exceptions being thrown. The exception is as follows: SEVERE: An exception occured writing the response entity java.lang.NullPointerException at java.nio.channels.spi.AbstractSelectableChannel.register(AbstractSelectableC hannel.java:180) at java.nio.channels.SelectableChannel.register(SelectableChannel.java:254) at org.restlet.util.ByteUtils$NbChannelOutputStream.doWrite(ByteUtils.java:261) at org.restlet.util.ByteUtils$NbChannelOutputStream.write(ByteUtils.java:294) at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202) at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:263) at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:106) at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:116) at java.io.OutputStreamWriter.write(OutputStreamWriter.java:203) at java.io.Writer.write(Writer.java:140) at org.restlet.resource.StringRepresentation.write(StringRepresentation.java:21 0) at org.restlet.resource.StreamRepresentation.write(StreamRepresentation.java:68 ) at com.noelios.restlet.http.HttpServerCall.writeResponseBody(HttpServerCall.jav a:491) at com.noelios.restlet.http.HttpServerCall.sendResponse(HttpServerCall.java:429 ) at com.noelios.restlet.http.HttpServerConverter.commit(HttpServerConverter.java :388) at com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:148) at com.noelios.restlet.ext.grizzly.HttpParserFilter.execute(HttpParserFilter.ja va:78) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolCh ain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.jav a:67) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:56 ) at com.sun.grizzly.util.WorkerThreadImpl.run(WorkerThreadImpl.java:169) Sep 26, 2008 12:35:53 PM com.noelios.restlet.LogFilter afterHandle Regards, Bruce Lee wrote: > Hi Jerome, > > Thanks a lot for the timely fix! I'll be looking forward to test out the > 1.1RC2. > > Regards, > > Jerome Louvel wrote: >> Hi Bruce, >> >> Thanks a lot for sharing this test class. It helped me to fix the >> remaining NIO exception that occured when the main selector was >> exhausted. Now a new temporary selector is properly registered and >> selected. Your test class works flawlessly! >> >> Please check in the upcoming 1.1 RC2. >> >> Best, >> Jerome >> >> >> Jerome Louvel a écrit : >>> Hi Bruce, >>> >>> I've just fixed the Grizzly/NIO exception that occurred on Linux >>> "Resource >>> temporarily unavailable). This solves an issue that was reported by >>> several >>> persons and that we were experiencing as well. >>> >>> I suggest that you try again when 1.1 RC2 is released. Hopefully soon >>> now. >>> >>> Best regards, >>> Jérôme Louvel >>> -- >>> Restlet ~ Founder and Lead developer ~ http://www.restlet.org >>> Noelios Technologies ~ Co-founder ~ http://www.noelios.com >>> >>> -----Message d'origine----- >>> De : news [mailto:[EMAIL PROTECTED] De la part de Bruce Lee >>> Envoyé : vendredi 19 septembre 2008 20:43 >>> À : [email protected] >>> Objet : Re: Random Grizzly IOException >>> >>> Hi Jerome, >>> >>> Sorry to took so long to reply as I got side tracked with other tasks >>> at hand, but I have tried my test case with the latest Restlet 1.1 >>> RC1 and the same problem still exists. I've attached my test code >>> with simple http server that simply tries to write 80k chars into the >>> response. If the client repeatedly request the page, then eventually >>> bytesWritten on the channel would be 0 (line 248 in ByteUtils.java) >>> and then it'll wait for 10 seconds with line 249 >>> if (SelectorFactory.getSelector().select(10000) == 0) { >>> Finally an exception will be logged. Interesting though, if you >>> remove the select line and allow it to spin on the channel write, the >>> correct data still gets written to the response. However, that is far >>> from the correct way to implement NIO so I've also tried replacing >>> the select with the following code. >>> >>> Selector writeSelector = SelectorFactory >>> .getSelector(); >>> if (writeSelector == null) { >>> // Continue using the main one. >>> continue; >>> } >>> >>> ((SelectableChannel) this.channel).register( >>> writeSelector, SelectionKey.OP_WRITE); >>> >>> if (writeSelector.select(10000) == 0) { >>> throw new IOException("Client disconnected"); >>> } >>> >>> But another set of exceptions occurs after a few requests: >>> >>> java.io.IOException: An established connection was aborted by the >>> software in your host machine >>> at sun.nio.ch.SocketDispatcher.write0(Native Method) >>> at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33) >>> at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:104) >>> at sun.nio.ch.IOUtil.write(IOUtil.java:75) >>> at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334) >>> at >>> org.restlet.util.ByteUtils$NbChannelOutputStream.doWrite(ByteUtils.java:243) >>> >>> at >>> org.restlet.util.ByteUtils$NbChannelOutputStream.write(ByteUtils.java:291) >>> >>> at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202) >>> at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272) >>> at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:276) >>> at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:122) >>> at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212) >>> at >>> org.restlet.resource.StringRepresentation.write(StringRepresentation.java:21 >>> >>> 2) >>> at >>> org.restlet.resource.StreamRepresentation.write(StreamRepresentation.java:68 >>> >>> ) >>> at >>> com.noelios.restlet.http.HttpServerCall.writeResponseBody(HttpServerCall.jav >>> >>> a:491) >>> at >>> com.noelios.restlet.http.HttpServerCall.sendResponse(HttpServerCall.java:429 >>> >>> ) >>> at >>> com.noelios.restlet.http.HttpServerConverter.commit(HttpServerConverter.java >>> >>> :388) >>> at >>> com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:148) >>> >>> at >>> com.noelios.restlet.ext.grizzly.HttpParserFilter.execute(HttpParserFilter.ja >>> >>> va:78) >>> at >>> com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolCh >>> >>> ain.java:137) >>> at >>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) >>> >>> at >>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) >>> >>> at >>> com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.jav >>> >>> a:67) >>> at >>> com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:56 >>> >>> ) >>> at >>> com.sun.grizzly.util.WorkerThreadImpl.run(WorkerThreadImpl.java:169) >>> Sep 19, 2008 2:29:40 PM com.noelios.restlet.http.HttpServerConverter >>> commit >>> SEVERE: An exception occured writing the response entity >>> java.io.IOException: Unable to write to the non-blocking channel. An >>> established connection was aborted by the software in your host machine >>> at >>> org.restlet.util.ByteUtils$NbChannelOutputStream.doWrite(ByteUtils.java:274) >>> >>> at >>> org.restlet.util.ByteUtils$NbChannelOutputStream.write(ByteUtils.java:291) >>> >>> at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202) >>> at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272) >>> at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:276) >>> at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:122) >>> at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212) >>> at >>> org.restlet.resource.StringRepresentation.write(StringRepresentation.java:21 >>> >>> 2) >>> at >>> org.restlet.resource.StreamRepresentation.write(StreamRepresentation.java:68 >>> >>> ) >>> at >>> com.noelios.restlet.http.HttpServerCall.writeResponseBody(HttpServerCall.jav >>> >>> a:491) >>> at >>> com.noelios.restlet.http.HttpServerCall.sendResponse(HttpServerCall.java:429 >>> >>> ) >>> at >>> com.noelios.restlet.http.HttpServerConverter.commit(HttpServerConverter.java >>> >>> :388) >>> at >>> com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:148) >>> >>> at >>> com.noelios.restlet.ext.grizzly.HttpParserFilter.execute(HttpParserFilter.ja >>> >>> va:78) >>> at >>> com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolCh >>> >>> ain.java:137) >>> at >>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) >>> >>> at >>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) >>> >>> at >>> com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.jav >>> >>> a:67) >>> at >>> com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:56 >>> >>> ) >>> at >>> com.sun.grizzly.util.WorkerThreadImpl.run(WorkerThreadImpl.java:169) >>> Sep 19, 2008 2:29:40 PM com.noelios.restlet.http.HttpServerConverter >>> commit >>> WARNING: Unable to send error response >>> java.io.IOException: An established connection was aborted by the >>> software in your host machine >>> at sun.nio.ch.SocketDispatcher.write0(Native Method) >>> at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33) >>> at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:104) >>> at sun.nio.ch.IOUtil.write(IOUtil.java:75) >>> at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334) >>> at >>> com.sun.grizzly.util.OutputWriter.flushChannel(OutputWriter.java:105) >>> at >>> com.sun.grizzly.util.OutputWriter.flushChannel(OutputWriter.java:73) >>> at >>> com.noelios.restlet.ext.grizzly.GrizzlyServerCall.writeResponseHead(GrizzlyS >>> >>> erverCall.java:269) >>> at >>> com.noelios.restlet.http.HttpServerCall.sendResponse(HttpServerCall.java:416 >>> >>> ) >>> at >>> com.noelios.restlet.http.HttpServerConverter.commit(HttpServerConverter.java >>> >>> :407) >>> at >>> com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:148) >>> >>> at >>> com.noelios.restlet.ext.grizzly.HttpParserFilter.execute(HttpParserFilter.ja >>> >>> va:78) >>> at >>> com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolCh >>> >>> ain.java:137) >>> at >>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) >>> >>> at >>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) >>> >>> at >>> com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.jav >>> >>> a:67) >>> at >>> com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:56 >>> >>> ) >>> at >>> com.sun.grizzly.util.WorkerThreadImpl.run(WorkerThreadImpl.java:169) >>> >>> >>> Regards >>> >>> Jerome Louvel wrote: >>> >>>> Hi Bruce, >>>> >>>> There is an existing bug report covering this exception: >>>> >>>> "File transfer exception on Linux" >>>> http://restlet.tigris.org/issues/show_bug.cgi?id=502 >>>> It would help if you could attach a simple reproducible test case and >>>> >>> maybe >>> >>>> dig into Grizzly extension code if you are more adventurous! >>>> >>>> Best regards, >>>> Jerome >>>> >>>> >>>> -----Message d'origine----- >>>> De : news [mailto:[EMAIL PROTECTED] De la part de Bruce Lee >>>> Envoye : mercredi 2 juillet 2008 22:02 >>>> A : [email protected] >>>> Objet : Random Grizzly IOException >>>> >>>> Hi, >>>> >>>> I'm testing out grizzly connector with the 1.1M4 built and I noticed >>>> that >>>> for >>>> requests takes a bit longer to generate the report, sometimes the >>>> >>> following >>> >>>> exceptions occurs: >>>> >>>> Jul 2, 2008 4:01:11 PM com.noelios.restlet.http.HttpServerConverter >>>> commit >>>> INFO: Exception intercepted >>>> java.io.IOException: Unable to write to the non-blocking channel. >>>> Unable >>>> >>> to >>> >>>> sele >>>> ct the channel to write to it. Selection timed out. >>>> at >>>> org.restlet.util.ByteUtils$NbChannelOutputStream.write(ByteUtils.java:219) >>>> >>>> at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202) >>>> at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:263) >>>> at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:106) >>>> at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:116) >>>> at java.io.OutputStreamWriter.write(OutputStreamWriter.java:203) >>>> at java.io.Writer.write(Writer.java:140) >>>> at >>>> >>>> >>> org.restlet.resource.StringRepresentation.write(StringRepresentation.java:19 >>> >>> >>>> 9) >>>> at >>>> >>>> >>> org.restlet.resource.StreamRepresentation.write(StreamRepresentation.java:59 >>> >>> >>>> ) >>>> at >>>> >>>> >>> com.noelios.restlet.http.HttpServerCall.writeResponseBody(HttpServerCall.jav >>> >>> >>>> a:545) >>>> at >>>> >>>> >>> com.noelios.restlet.http.HttpServerCall.sendResponse(HttpServerCall.java:484 >>> >>> >>>> ) >>>> at >>>> >>>> >>> com.noelios.restlet.http.HttpServerConverter.commit(HttpServerConverter.java >>> >>> >>>> :394) >>>> at >>>> com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:96) >>>> >>>> at >>>> >>>> >>> com.noelios.restlet.ext.grizzly.HttpParserFilter.execute(HttpParserFilter.ja >>> >>> >>>> va:68) >>>> at >>>> >>>> >>> com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolCh >>> >>> >>>> ain.java:124) >>>> at >>>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) >>>> >>>> at >>>> com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:75) >>>> >>>> at >>>> >>>> >>> com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.jav >>> >>> >>>> a:54) >>>> at >>>> >>>> >>> com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57 >>> >>> >>>> ) >>>> at >>>> com.sun.grizzly.util.WorkerThreadImpl.run(WorkerThreadImpl.java:154) >>>> >>>> This happens maybe every few other requests and hence renders the >>>> >>> extension >>> >>>> unusable. I'm wondering if this is a known issue with the extension or >>>> >>> there >>> >>>> is >>>> something I need to configure to avoid hitting this error. >>>> >>>> My environment is as follows: >>>> jdk1.6.0_06 >>>> restlet 1.1m4 >>>> grizzly 1.7.3 (also tried 1.8.0, the same error) >>>> The output is a XML file converted to String object, stored with >>>> StringRepresentation. >>>> >>>> Regards, >>>> >>>> >>>> >>> >>> >>> >> >> -- >> Jerome Louvel >> http://www.noelios.com >> > >
