James Clampffer created HDFS-11807:
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Summary: libhdfs++: Get minidfscluster tests running under valgrind
Key: HDFS-11807
URL: https://issues.apache.org/jira/browse/HDFS-11807
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: James Clampffer
Assignee: James Clampffer
The gmock based unit tests generally don't expose race conditions and memory
stomps. A good way to expose these is running libhdfs++ stress tests and tools
under valgrind and pointing them at a real cluster. Right now the CI tools
don't do that so bugs occasionally slip in and aren't caught until they cause
trouble in applications that use libhdfs++ for HDFS access.
The reason the minidfscluster tests don't run under valgrind is because the GC
and JIT compiler in the embedded JVM do things that look like errors to
valgrind. I'd like to have these tests do some basic setup and then fork into
two processes: one for the minidfscluster stuff and one for the libhdfs++
client test. A small amount of shared memory can be used to provide a place
for the minidfscluster to stick the hdfsBuilder object that the client needs to
get info about which port to connect to. Can also stick a condition variable
there to let the minidfscluster know when it can shut down.
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