Http2Stream blocked forever 3.6.0

[xuegl]

Our team recently upgrade okhttp3 to 3.6.0, and found that sometimes one of our tasks is often blocked. The ANR trace is dumped:

"SyncCoordinator" daemon prio=5 tid=38 Waiting
  | group="main" sCount=1 dsCount=0 obj=0x12c2c0c0 self=0xdaf55300
  | sysTid=18321 nice=19 cgrp=bg_non_interactive sched=0/0 handle=0xd8efa930
  | state=S schedstat=( 25801330653 19599660882 53090 ) utm=1695 stm=885 core=3 HZ=100
  | stack=0xd8df8000-0xd8dfa000 stackSize=1038KB
  | held mutexes=
  at java.lang.Object.wait!(Native method)
  - waiting on <0x05597df9> (a okhttp3.internal.http2.Http2Stream)
  at okhttp3.internal.http2.Http2Stream.waitForIo(Http2Stream.java:577)
  at okhttp3.internal.http2.Http2Stream.takeResponseHeaders(Http2Stream.java:143)
  - locked <0x05597df9> (a okhttp3.internal.http2.Http2Stream)
  at okhttp3.internal.http2.Http2Codec.readResponseHeaders(Http2Codec.java:120)
  at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:67)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
  at com.facebook.stetho.okhttp3.StethoInterceptor.intercept(StethoInterceptor.java:59)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
  at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
  at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
  at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
  at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
  at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)

this can't be recovered, even i turn off the wifi.

[xuegl]

when debugging, I also encountered the PROTOCOL_ERROR. so i add some okhttp log as well as the frame log, as below:

System.err  W  >> 0x000000a5  5326 HEADERS       END_STREAM|END_HEADERS
                         W  << 0x00000000     8 GOAWAY
                         W  >> 0x00000000     8 GOAWAY
                         W  >> 0x000000a5     4 RST_STREAM
                         W  >> CONNECTION 505249202a20485454502f322e300d0a0d0a534d0d0a0d0a
                         W  >> 0x00000000     6 SETTINGS
                         W  >> 0x00000000     4 WINDOW_UPDATE
                         W  << 0x00000000    18 SETTINGS
                         W  >> 0x00000003  5585 HEADERS       END_STREAM|END_HEADERS
                         W  >> 0x00000000     0 SETTINGS      ACK
                         W  << 0x00000000     4 WINDOW_UPDATE
                         W  << 0x00000000     0 SETTINGS      ACK
                         W  << 0x00000000     8 GOAWAY
                         W  >> 0x00000000     8 GOAWAY
                         W  >> 0x00000003     4 RST_STREAM
                 OkHttp  D  <-- HTTP FAILED: okhttp3.internal.http2.StreamResetException: stream was reset: PROTOCOL_ERROR

but i am not sure if this is the reason

[swankjesse]

Which webserver?