The case is the following:

I have a clustered cache on which I want to perform a search. I'm doing the following:
I'm initializing SearchManager on node1, I'm registering a custom key transformer for my key using the created searchmanager, but then when I'm trying to put data into the cache on node1 (which is in REPL_SYNC mode with cache on node2), I'm getting the exception:

java.lang.IllegalArgumentException: Indexing only works with entries keyed on Strings, primitives and classes that have the @Transformable annotation - you passed in a class org.infinispan.query.test.CustomKey3. Alternatively, see org.infinispan.query.SearchManager#registerKeyTransformer

When I'm initializing the SearchManager using node2 cache and register the keyTransformer on it as well, then everything works perfectly, even though I am not using the second created SearchManager.
The test which reproduces the issue is attached to the jira. Please see the test case: testSearchKeyTransformer()