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https://issues.apache.org/jira/browse/IMPALA-11176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yida Wu resolved IMPALA-11176.
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Resolution: Fixed
> 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 4.0.0, Impala 3.4.0
> Reporter: Yida Wu
> Assignee: Yida Wu
> Priority: Critical
> 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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