[jira] [Created] (IMPALA-11176) Memory leak in ClientCacheHelper

["Yida Wu (Jira)" <ji...@apache.org>]

Yida Wu created IMPALA-11176:
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             Summary: Memory leak in ClientCacheHelper
                 Key: IMPALA-11176
                 URL: https://issues.apache.org/jira/browse/IMPALA-11176
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.4.0, Impala 4.0.0
            Reporter: Yida Wu
             Fix For: Impala 4.1.0


ClientCacheHelper::CreateClient uses a function pointer "factory_method" to create a new ThriftClientImpl object and store it in a share pointer of type ThriftClientImpl.

However, in the implementation of the function pointer, which uses ClientCache::MakeClient, it creates a derived object of ThriftClientImpl and return the pointer as the base object pointer ThriftClientImpl*. When the ClientCacheHelper::CreateClient uses the returned pointer to create a base shared pointer, it can't recognize that the pointer is from a derived object, therefore something goes wrong that the shared pointer couldn't release all the memory occupied by the derived object.



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