tillrohrmann commented on a change in pull request #14902:
URL: https://github.com/apache/flink/pull/14902#discussion_r572274348
##########
File path:
flink-queryable-state/flink-queryable-state-runtime/src/test/java/org/apache/flink/queryablestate/itcases/AbstractQueryableStateTestBase.java
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@@ -361,6 +372,65 @@ public Integer getKey(Tuple2<Integer, Long> value) {
}
}
+ /** This test checks if custom Kryo serializers are loaded with correct
classloader. */
+ @Test
+ public void testCustomKryoSerializerHandling() throws Exception {
+ final Deadline deadline = Deadline.now().plus(TEST_TIMEOUT);
+ final long numElements = 1;
+ final String stateName = "teriberka";
+
+ final String customSerializerClassName = "CustomKryo";
+ final URLClassLoader userClassLoader =
+
createLoaderWithCustomKryoSerializer(customSerializerClassName);
+
+ StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
+ env.setStateBackend(stateBackend);
+ env.setParallelism(maxParallelism);
+ // Very important, because cluster is shared between tests and we
+ // don't explicitly check that all slots are available before
+ // submitting.
+
env.setRestartStrategy(RestartStrategies.fixedDelayRestart(Integer.MAX_VALUE,
1000L));
+
+ // Custom serializer is not needed, it's used just to check if
serialization works.
+ @SuppressWarnings("unchecked")
+ Class<Serializer<?>> customSerializerClass =
+ (Class<Serializer<?>>)
userClassLoader.loadClass(customSerializerClassName);
+ env.getConfig().addDefaultKryoSerializer(Byte.class,
customSerializerClass);
Review comment:
I think we have to register a serializer instance to make this test
work. If we only use a `Class`, then the system won't try to duplicate it.
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