Cache in RedisUtils is not thread safe

[pete-woods]

Affects Version(s): master

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The LinkedHashMap in https://github.com/spring-projects/spring-integration/blob/master/spring-integration-redis/src/main/java/org/springframework/integration/redis/util/RedisUtils.java is accessed from multiple threads when using RedisLockRegistry, resulting in concurrency exceptions. I worked around the problem in my app by overriding the implementation there with one using Guava's cache. Spring integration doesn't have a dependency on Caffeine or Guava, or I'd have submitted a simple patch.

[garyrussell]

Why do we call this on every remove call anyway? We should just cache the result in the store and registry during intiialization since the RedisTemplate is final in both cases.

[pete-woods]

Thanks for the quick fix!