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.

Comienza con el fallo intermitente de Testcontainers al iniciar el contenedor y la dependencia shaded docker-java-transport-okhttp; después, revisa el issue 1507 enlazado de docker-java y el stack trace de OkHttp 3.14.4. Se considerará terminado cuando se haya establecido si el NPE se resuelve mediante un cambio de versión upstream o requiere una ruta de dependencia no-shaded compatible.