Server stuck on Exception

[javalin]

Server stuck on Exception

[vellrya]

Unfortunately not, but if the error repeats again (it was already twice), then I will send it to you

[tipsy]

That seems odd. Could you tell me the steps to reproduce this?

[vellrya]

During the multipart request, the mobile network on my phone disconnected. I got the Multipart parsing failed error. I returned the network to the device and decided to repeat the request, but the server no longer responded. Then I pressed Ctrl+C to stop and restart it. And then I saw the execution of my previous request and the server was again ready to work. The reboot did not happen - the server just continued to work from the place where it stuck.

[tipsy]

Do you have the stacktrace still?

[vellrya]

Ok, here it is. Again(

[qtp377478451-17] WARN org.eclipse.jetty.server.HttpChannel - /ocrit
java.io.IOException: java.util.concurrent.TimeoutException: Idle timeout expired: 30028/30000 ms
        at org.eclipse.jetty.server.HttpInput$ErrorState.noContent(HttpInput.java:1069)
        at org.eclipse.jetty.server.HttpInput.read(HttpInput.java:309)
        at java.io.InputStream.read(Unknown Source)
        at kotlin.io.ByteStreamsKt.copyTo(IOStreams.kt:105)
        at kotlin.io.ByteStreamsKt.copyTo$default(IOStreams.kt:98)
        at kotlin.io.ByteStreamsKt.readBytes(IOStreams.kt:117)
        at kotlin.io.ByteStreamsKt.readBytes$default(IOStreams.kt:115)
        at io.javalin.embeddedserver.CachedRequestWrapper.<init>(CachedRequestWrapper.kt:17)
        at io.javalin.core.JavalinServlet.service(JavalinServlet.kt:37)
        at io.javalin.embeddedserver.jetty.EmbeddedJettyServer$start$httpHandler$1.doHandle(EmbeddedJettyServer.kt:34)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1568)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:61)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at org.eclipse.jetty.server.Server.handle(Server.java:561)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:334)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:104)
        at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
        at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
        at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
        at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
        at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:243)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:679)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:597)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.util.concurrent.TimeoutException: Idle timeout expired: 30028/30000 ms
        at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:166)
        at org.eclipse.jetty.io.IdleTimeout$1.run(IdleTimeout.java:50)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        ... 1 more
        Suppressed: java.lang.Throwable: HttpInput failure
                at org.eclipse.jetty.server.HttpInput.failed(HttpInput.java:816)
                at org.eclipse.jetty.server.HttpConnection$BlockingReadCallback.failed(HttpConnection.java:612)
                at org.eclipse.jetty.io.FillInterest.onFail(FillInterest.java:136)
                at org.eclipse.jetty.io.AbstractEndPoint.onIdleExpired(AbstractEndPoint.java:398)
                ... 9 more

The connection on my phone is still bad, and it causes such an exception. The only problem is that the server stops working until Ctrl+C is pressed

[tipsy]

Thanks, I'll try to find out what's wrong. Could you also include the code that's causing this?

[tipsy]

@vellrya could you build this branch https://github.com/tipsy/javalin/tree/issue-73 and see if that fixes the issue?

[vellrya]

@tipsy Can you post changes to Maven or provide Jar, please?

[tipsy]

I can build you a jar in an hour or two when I get home. If want to try before that, you can checkout the branch and run mvn clean install, then depend on 0.5.3-SNAPSHOT.

[tipsy]

@vellrya here is the jar: https://drive.google.com/open?id=0BzKbHpeI5ubmQVo0bDdzdXBTbW8

[vellrya]

Ok, I'll try this.

[vellrya]

Unfortunately, the problem remained. Now I see no exceptions, the server just stucks. Experienced, I found that, in addition to Ctrl + C, the right mouse button can be used to continue the server operation. Perhaps, if I fully describe my problem, a solution will be found. I'm testing the speed of uploading files. I upload small pictures to the server (about 40 KB). When connecting via Wi-Fi, the download takes less than 100 ms, but uploading the same picture via the mobile Internet requires 10+ seconds. Speedtest shows that the upload speed is 0.5mb, so picture of 40 KB should send less than 1 second (320 kilobits / 512 =0.625), but that's not the case. So, in some cases, the upload time for unknown reasons reaches 30 seconds and then timeout Exception throwing. As far as I understand, it is after such incidents that the server gets stuck

P.S. I hope that Google translator retained the basic idea)

[tipsy]

Now I see no exceptions, the server just stucks

Do you have a logger enabled? Add

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-simple</artifactId>
    <version>1.7.21</version>
</dependency>

to your POM and you should get a log message like "Exception occurred while servicing request", and a stacktrace. I'm surprised it still gets stuck though, I wrapped the body of the Jetty doHandle method in a try-catch, and if that doesn't work the problem has to be with Jetty itself. Debugging this is a bit tricky, but I'll see if I can reproduce it in the weekend.

[tipsy]

Going to close this since no other people have reported it happening in three months, and I can't reproduce it either.