[infinispan-issues] [JBoss JIRA] (ISPN-6414) Hybrid query + compat mode applies type conversion too early (perf issue)

[Adrian Nistor (JIRA)]

Adrian Nistor created ISPN-6414:
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             Summary: Hybrid query + compat mode applies type conversion too early (perf issue)
                 Key: ISPN-6414
                 URL: https://issues.jboss.org/browse/ISPN-6414
             Project: Infinispan
          Issue Type: Bug
          Components: Remote Querying
    Affects Versions: 8.2.0.Final
            Reporter: Adrian Nistor
            Assignee: Adrian Nistor
             Fix For: 9.0.0.Final, 9.0.0.Alpha1, 8.2.1.Final


To reproduce we need a compat mode cache and a remote hybrid query or any query that is executed in two phases (indexed + non indexed). The type conversion interceptor will convert the result of the first phase (from Java object to protobuf) and then the second phase will execute a matcher on the protobuf output of the first phase.

This can be optimized by avoiding early type conversion. The output of the first phase should produce unconverted results, ie. java objects. Then the second phase matcher should filter on these objects (ReflectionMatcher). These results are then implicitly type-converted when are marshalled back to the client, but the type converter interceptor is no longer involved. To avoid type conversion kicking in early we need to stop obtaining the cache using the Flag.OPERATION_HOTROD in org.infinispan.query.remote.impl.LifecycleManager, and then there are some other places in RemoteQueryEngine and friends that need to be adjusted following this change.



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