Sink.writeString crashes

[edenman]

java.io.EOFException: Buffer exhausted before skipping 8192 bytes.
	at kotlinx.io.Buffer.skip(Buffer.kt:287)
	at kotlinx.io.OutputStreamSink.write(JvmCore.kt:121)
	at kotlinx.io.RealSink.hintEmit(RealSink.kt:109)
 	at kotlinx.io.Utf8Kt.writeString(Utf8.kt:731)
 	at kotlinx.io.Utf8Kt.writeString$default(Utf8.kt:169)
... (my calling code here)

Is there anything I should be doing to make this not crash? Or just catch/ignore? I'm using writeString to append logs to a file

kotlinx-io 0.5.4

[fzhinkin]

@edenman could you please share a reproducer? By looking at the code around the stacktrace you provided, I can't see how we can end up throwing the EOF exception, so it would be helpful to find how to reproduce the issue.

[edenman]

I'll try to work one up. My best guess is that multiple threads were trying to writeString on same Sink at the same time?

[fzhinkin]

My best guess is that multiple threads were trying to writeString on same Sink at the same time

Sink implementations provided by the kotlinx-io library are not thread safe, so it's an error to write into a single sink concurrently.

[edenman]

Well that sure would do it. Thanks!