NullPointerException in old shaded OkHttp version

Hi

We're getting occasional flaky tests when using testcontainers-java which has an embedded docker-java-transport-okhttp shaded in its jar.

Could not start container
java.lang.NullPointerException
  at org.testcontainers.shaded.okio.Okio$1.write(Okio.java:78)
  at org.testcontainers.shaded.okio.AsyncTimeout$1.write(AsyncTimeout.java:180)
  at org.testcontainers.shaded.okio.RealBufferedSink.flush(RealBufferedSink.java:224)
  at org.testcontainers.shaded.okhttp3.internal.http1.Http1ExchangeCodec.finishRequest(Http1ExchangeCodec.java:190)
  at org.testcontainers.shaded.okhttp3.internal.connection.Exchange.finishRequest(Exchange.java:101)
  at org.testcontainers.shaded.okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:86)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
  at org.testcontainers.shaded.com.github.dockerjava.okhttp.HijackingInterceptor.intercept(HijackingInterceptor.java:20)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
  at org.testcontainers.shaded.okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:43)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
  at org.testcontainers.shaded.okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:94)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
  at org.testcontainers.shaded.okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
  at org.testcontainers.shaded.okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:88)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
  at org.testcontainers.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
  at org.testcontainers.shaded.okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:229)
  at org.testcontainers.shaded.okhttp3.RealCall.execute(RealCall.java:81)
  at org.testcontainers.shaded.com.github.dockerjava.okhttp.OkDockerHttpClient$OkResponse.<init>(OkDockerHttpClient.java:251)
  at org.testcontainers.shaded.com.github.dockerjava.okhttp.OkDockerHttpClient.execute(OkDockerHttpClient.java:225)
  at org.testcontainers.shaded.com.github.dockerjava.core.DefaultInvocationBuilder.execute(DefaultInvocationBuilder.java:228)
  at org.testcontainers.shaded.com.github.dockerjava.core.DefaultInvocationBuilder.post(DefaultInvocationBuilder.java:125)
  at org.testcontainers.shaded.com.github.dockerjava.core.exec.CreateContainerCmdExec.execute(CreateContainerCmdExec.java:33)
  at org.testcontainers.shaded.com.github.dockerjava.core.exec.CreateContainerCmdExec.execute(CreateContainerCmdExec.java:13)
  at org.testcontainers.shaded.com.github.dockerjava.core.exec.AbstrSyncDockerCmdExec.exec(AbstrSyncDockerCmdExec.java:21)
  at org.testcontainers.shaded.com.github.dockerjava.core.command.AbstrDockerCmd.exec(AbstrDockerCmd.java:35)
  at org.testcontainers.shaded.com.github.dockerjava.core.command.CreateContainerCmdImpl.exec(CreateContainerCmdImpl.java:595)
  at org.testcontainers.containers.GenericContainer.tryStart(GenericContainer.java:404)
  at org.testcontainers.containers.GenericContainer.lambda$doStart$0(GenericContainer.java:322)
  at org.rnorth.ducttape.unreliables.Unreliables.retryUntilSuccess(Unreliables.java:81)
  at org.testcontainers.containers.GenericContainer.doStart(GenericContainer.java:320)
  at org.testcontainers.containers.GenericContainer.start(GenericContainer.java:308)
  at org.testcontainers.lifecycle.Startable$start.call(Unknown Source)

docker-java-transport-okhttp currently depends on OkHttp 3.14.4, but there have been many releases since: they're up to 4.9.0 and the code in question has changed somewhat, presumably fixing bugs. I've raised https://github.com/docker-java/docker-java/issues/1507 there to suggest bumping the issue, but it's difficult to test whether the latest version still has the bug since the dependency is shaded.

It would be good to have a non-shaded library that would allow your users to bump versions if they need to in situations like this. It might also be good to bump the OkHttp version if upstream doesn't do it soon.

Inizia con il fallimento intermittente di Testcontainers all’avvio del container e con la dipendenza shaded docker-java-transport-okhttp, quindi esamina l’issue 1507 di docker-java collegata e lo stack trace di OkHttp 3.14.4. Il lavoro è completato quando viene stabilito se il NPE viene risolto da una modifica della versione upstream o richiede un percorso di dipendenza non-shaded supportato.