Yifan Cai created CASSANDRA-15383:
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             Summary: Unable to init Verb in jvm-dtest
                 Key: CASSANDRA-15383
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15383
             Project: Cassandra
          Issue Type: Bug
          Components: Test/dtest
            Reporter: Yifan Cai


Verb cannot be initialized in dtest. The test cases that has references to Verb 
get the following error
{code:java}
java.lang.ExceptionInInitializerError
        at org.apache.cassandra.net.Verb.<clinit>(Verb.java:87)
        at 
org.apache.cassandra.distributed.test.DistributedReadWritePathTest.failingReadRepairTest(DistributedReadWritePathTest.java:134)
Caused by: java.lang.NullPointerException
        at 
org.apache.cassandra.config.DatabaseDescriptor.getConcurrentReaders(DatabaseDescriptor.java:1611)
        at org.apache.cassandra.concurrent.Stage.<clinit>(Stage.java:48)
{code}
It is caused by the DatabaseDescriptor being uninitialized and NPE was thrown. 
The dtest initializes the DatabaseDescriptor at instance-level with the 
isolated InstanceClassLoader. Since test code is not loaded by the 
InstanceClassLoader, it does not know the already initialized 
DatabaseDescriptor.



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