Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

java.lang.IllegalStateException: Reading is not available in state Reading

See original GitHub issue

Ktor Version

1.0.1

Ktor Engine Used(client or server and name)

Netty / Firefox

JVM Version, Operating System and Relevant Context

1.8 Windows Server 2008R2

Feedback

I don’t how this happen, I can’t reproduce it.

stacktrace:

500 Internal Server Error: POST - /search/TT
java.lang.IllegalStateException: Reading is not available in state Reading
        at kotlinx.coroutines.io.internal.ReadWriteBufferState.startReading$kotlinx_coroutines_io_jvm(ReadWriteBufferSta
te.kt:19)
        at kotlinx.coroutines.io.ByteBufferChannel.setupStateForRead(ByteBufferChannel.kt:238)
        at kotlinx.coroutines.io.ByteBufferChannel.access$setupStateForRead(ByteBufferChannel.kt:21)
        at kotlinx.coroutines.io.ByteBufferChannel.lookAhead(ByteBufferChannel.kt:2868)
        at kotlinx.coroutines.io.DelimitedKt.readUntilDelimiter(Delimited.kt:24)
        at io.ktor.http.cio.MultipartKt.copyUntilBoundary(Multipart.kt:339)
        at io.ktor.http.cio.MultipartKt$copyUntilBoundary$1.invokeSuspend(Multipart.kt)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32)
        at kotlinx.coroutines.DispatchedContinuation.resumeWith(Dispatched.kt:111)
        at kotlinx.coroutines.io.internal.CancellableReusableContinuation.resumeWith(CancellableReusableContinuation.kt:
83)
        at kotlinx.coroutines.io.ByteBufferChannel.resumeWriteOp(ByteBufferChannel.kt:2207)
        at kotlinx.coroutines.io.ByteBufferChannel.bytesRead(ByteBufferChannel.kt:865)
        at kotlinx.coroutines.io.ByteBufferChannel.readAsMuchAsPossible(ByteBufferChannel.kt:426)
        at kotlinx.coroutines.io.ByteBufferChannel.readAvailable(ByteBufferChannel.kt:559)
        at kotlinx.coroutines.io.ByteBufferChannel.readAvailableSuspend(ByteBufferChannel.kt:593)
        at kotlinx.coroutines.io.ByteBufferChannel$readAvailableSuspend$2.invokeSuspend(ByteBufferChannel.kt)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32)
        at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:236)
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463)
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.lang.Thread.run(Thread.java:748)

Issue Analytics

State:
Created 5 years ago
Comments:10 (3 by maintainers)

Top GitHub Comments

1reaction

kobevaliantcommented, Jul 5, 2019

Hi, I upgraded ktor to 1.2.2. But this issue exists still. The client is commons-httpclient. The server OS is CentOS7. After this exeption happens, all clients will be blocked forever(without timeout settings). Stacktrace is:

java.lang.IllegalStateException: Reading is not available in state Reading
  at kotlinx.coroutines.io.internal.ReadWriteBufferState.startReading$kotlinx_coroutines_io(ReadWriteBufferState.kt:19)
  at kotlinx.coroutines.io.ByteBufferChannel.setupStateForRead(ByteBufferChannel.kt:238)
  at kotlinx.coroutines.io.ByteBufferChannel.access$setupStateForRead(ByteBufferChannel.kt:21)
  at kotlinx.coroutines.io.ByteBufferChannel.lookAhead(ByteBufferChannel.kt:2874)
  at kotlinx.coroutines.io.DelimitedKt.readUntilDelimiter(Delimited.kt:24)
  at io.ktor.http.cio.MultipartKt.copyUntilBoundary(Multipart.kt:346)
  at io.ktor.http.cio.MultipartKt$copyUntilBoundary$1.invokeSuspend(Multipart.kt)
  at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32)
  at kotlinx.coroutines.DispatchedContinuation.resumeWith(Dispatched.kt:108)
  at kotlinx.coroutines.io.internal.CancellableReusableContinuation.resumeWith(CancellableReusableContinuation.kt:83)
  at kotlinx.coroutines.io.ByteBufferChannel.resumeWriteOp(ByteBufferChannel.kt:2210)
  at kotlinx.coroutines.io.ByteBufferChannel.bytesRead(ByteBufferChannel.kt:865)
  at kotlinx.coroutines.io.ByteBufferChannel.readAsMuchAsPossible(ByteBufferChannel.kt:426)
  at kotlinx.coroutines.io.ByteBufferChannel.readAvailable(ByteBufferChannel.kt:559)
  at kotlinx.coroutines.io.ByteBufferChannel.readAvailableSuspend(ByteBufferChannel.kt:593)
  at kotlinx.coroutines.io.ByteBufferChannel$readAvailableSuspend$2.invokeSuspend(ByteBufferChannel.kt)
  at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32)
  at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:233)
  at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
  at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463)
  at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
  at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
  at java.lang.Thread.run(Thread.java:748)

@cy6erGn0m Please take a look, thanks

1reaction

cy6erGn0mcommented, Mar 21, 2019

@e5l same here: according to the stacktrace

        at kotlinx.coroutines.io.ByteBufferChannel.lookAhead(ByteBufferChannel.kt:2868)
        at kotlinx.coroutines.io.DelimitedKt.readUntilDelimiter(Delimited.kt:24)

readUntilDelimiter does enter lookAhead and fails immediately because we already have reading state. I see no way how any read operation could leave reading state unreleased without exceptions that usually kill everything.