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The error happen sometimes in this PR: https://github.com/infinispan/infinispan-hadoop/pull/6 when running on Travis. It's possible to reproduce locally by pinning the execution to a single CPU, running on a loop:

taskset -c 0 mvn clean install -Dtest=FailoverHandlingTest#testReadFromInfinispanSaveToHDFS_StopPreferedServer
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The error happen sometimes in this PR: https://github.com/infinispan/infinispan-hadoop/pull/6 when running on Travis. It's possible to reproduce locally by pinning the execution to a single CPU, running on a loop: taskset -c 0 mvn clean install -Dtest=FailoverHandlingTest#testReadFromInfinispanSaveToHDFS_StopPreferedServer

Sometimes cache.getTopologyInfo fails with:

java.lang.NullPointerException: null
	at org.infinispan.client.hotrod.impl.CacheTopologyInfoImpl.getNumSegments(CacheTopologyInfoImpl.java:26)

is caused by

ISPN-6460 Race condition during server start causes wrong configuration to be used for cache 'default'