Jens Deppe created GEODE-9437:
---------------------------------

             Summary: Redis session dunit tests are flaky
                 Key: GEODE-9437
                 URL: https://issues.apache.org/jira/browse/GEODE-9437
             Project: Geode
          Issue Type: Test
          Components: redis
            Reporter: Jens Deppe


The Redis session-related DUnit tests will sometimes fail with errors such as:
{noformat}
org.apache.geode.redis.session.RedisSessionDUnitTest > should_storeSession 
FAILED
    
org.springframework.web.client.HttpServerErrorException$InternalServerError: 
500 Server Error: [no body]
        at 
org.springframework.web.client.HttpServerErrorException.create(HttpServerErrorException.java:100)
        at 
org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:188)
        at 
org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:125)
        at 
org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
        at 
org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:819)
        at 
org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:777)
        at 
org.springframework.web.client.RestTemplate.execute(RestTemplate.java:711)
        at 
org.springframework.web.client.RestTemplate.postForEntity(RestTemplate.java:468)
        at 
org.apache.geode.redis.session.SessionDUnitTest.createNewSessionWithNote0(SessionDUnitTest.java:207)
        at 
org.apache.geode.redis.session.SessionDUnitTest.lambda$createNewSessionWithNote$1(SessionDUnitTest.java:201)
        at 
io.github.resilience4j.retry.Retry.lambda$decorateCallable$5(Retry.java:306)
        at 
org.apache.geode.redis.session.SessionDUnitTest.createNewSessionWithNote(SessionDUnitTest.java:201)
        at 
org.apache.geode.redis.session.RedisSessionDUnitTest.should_storeSession(RedisSessionDUnitTest.java:88)

org.apache.geode.redis.session.RedisSessionDUnitTest > 
should_propagateSession_toOtherServers FAILED
    
org.springframework.web.client.HttpServerErrorException$InternalServerError: 
500 Server Error: 
[{"timestamp":"2021-07-19T15:38:49.855+00:00","status":500,"error":"Internal 
Server Error","path":"/addSessionNote"}]
        at 
org.springframework.web.client.HttpServerErrorException.create(HttpServerErrorException.java:100)
        at 
org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:188)
        at 
org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:125)
        at 
org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
        at 
org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:819)
        at 
org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:777)
        at 
org.springframework.web.client.RestTemplate.execute(RestTemplate.java:711)
        at 
org.springframework.web.client.RestTemplate.postForEntity(RestTemplate.java:468)
        at 
org.apache.geode.redis.session.SessionDUnitTest.createNewSessionWithNote0(SessionDUnitTest.java:207)
        at 
org.apache.geode.redis.session.SessionDUnitTest.lambda$createNewSessionWithNote$1(SessionDUnitTest.java:201)
        at 
io.github.resilience4j.retry.Retry.lambda$decorateCallable$5(Retry.java:306)
        at 
org.apache.geode.redis.session.SessionDUnitTest.createNewSessionWithNote(SessionDUnitTest.java:201)
        at 
org.apache.geode.redis.session.RedisSessionDUnitTest.should_propagateSession_toOtherServers(RedisSessionDUnitTest.java:97)
{noformat}

It's unclear exactly what is causing the problem as it seems to be related to 
lettuce when servers stop/restart and lettuce tries to resubmit commands.



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