[INTEGRATION_TESTS] Random failure of tests (java.net.ConnectException)

[echarles]

I have random failures of tests due to connection failure java.net.ConnectException: Failed to connect to /192.168.99.101:30412.

When I run again after those failed tests, it is in general successful.

- Run PySpark Job on file from SUBMITTER with --py-files
- Run PySpark Job on file from CONTAINER with spark.jar defined
- Run SparkR Job on file locally
- Run SparkR Job on file from SUBMITTER
- Simple submission test with the resource staging server. *** FAILED ***
  java.net.ConnectException: Failed to connect to /192.168.99.101:30412
  at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:225)
  at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:149)
  at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:195)
  at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121)
  at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100)
  at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
  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)
  ...
  Cause: java.net.ConnectException: Connection refused
  at java.net.PlainSocketImpl.socketConnect(Native Method)
  at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
  at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  at java.net.Socket.connect(Socket.java:589)
  at okhttp3.internal.platform.Platform.connectSocket(Platform.java:124)
  at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:223)
  at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:149)
  at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:195)
  ...
- Enable SSL on the resource staging server *** FAILED ***
  java.net.ConnectException: Failed to connect to /192.168.99.101:30223
  at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:225)
  at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:149)
  at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:195)
  at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121)
  at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100)
  at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
  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)
  ...
  Cause: java.net.ConnectException: Connection refused
  at java.net.PlainSocketImpl.socketConnect(Native Method)
  at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
  at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  at java.net.Socket.connect(Socket.java:589)
  at okhttp3.internal.platform.Platform.connectSocket(Platform.java:124)
  at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:223)
  at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:149)
  at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:195)
  ...
- Use container-local resources without the resource staging server
- Dynamic executor scaling basic test
- Use remote resources without the resource staging server.
- Mix remote resources with submitted ones.
- Use key and certificate PEM files for TLS.
- Use client key and client cert file when requesting executors
- Added files should be placed in the driver's working directory.
- Setting JVM options on the driver and executors with spaces.
- Submit small local files without the resource staging server.
- Use a very long application name.

[ifilonenko]

Thank you for formalizing this issue. It is an error that we are tracking and have seen throughout various runs as well

[echarles]

yes, I heard this being reported in the weekly SIG meetings but didn't find an opened issue to track it down. I wonder if this not linked to the slow start reported in #572. Sounds to me like the connection between the maven test and minikube may be slow due to DNS, communication with VBox (or whatever).

Do you have those failures if you run the integration tests against a real remote cluster (not a local minikube?) or a minikube deployed on the bare linux (not via VBox)? I will try to test on a remote cluster.