NPE when command timeout and MultiValueResponse.output is null [DATAREDIS-1081]

zhou-hao opened DATAREDIS-1081 and commented

https://github.com/spring-projects/spring-data-redis/blob/master/src/main/java/org/springframework/data/redis/connection/ReactiveHashCommands.java#L296-L302https://github.com/spring-projects/spring-data-redis/blob/master/src/main/java/org/springframework/data/redis/connection/ReactiveHashCommands.java#L296-L302

io.lettuce.core.RedisCommandTimeoutException: Command timed out after 1 minute(s) at io.lettuce.core.ExceptionFactory.createTimeoutException(ExceptionFactory.java:51) Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: Assembly trace from producer [reactor.core.publisher.MonoFromPublisher] : reactor.core.publisher.Mono.from(Mono.java:362) io.lettuce.core.AbstractRedisReactiveCommands.createMono(AbstractRedisReactiveCommands.java:433)Error has been observed at the following site(s): |_ Mono.from ⇢ at io.lettuce.core.AbstractRedisReactiveCommands.createMono(AbstractRedisReactiveCommands.java:433)Stack trace: at io.lettuce.core.ExceptionFactory.createTimeoutException(ExceptionFactory.java:51) at io.lettuce.core.protocol.CommandExpiryWriter.lambda$potentiallyExpire$0(CommandExpiryWriter.java:167) at io.netty.util.concurrent.PromiseTask$RunnableAdapter.call(PromiseTask.java:38) at io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:139) at io.netty.util.concurrent.DefaultEventExecutor.run(DefaultEventExecutor.java:66) at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1044) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748)

java.lang.NullPointerException: The mapper returned a null value. at java.util.Objects.requireNonNull(Objects.java:228) Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: Assembly trace from producer [reactor.core.publisher.MonoMapFuseable] : reactor.core.publisher.Mono.map(Mono.java:3021) org.springframework.data.redis.connection.ReactiveHashCommands.hGet(ReactiveHashCommands.java:285)Error has been observed at the following site(s): |_           Mono.map ⇢ at org.springframework.data.redis.connection.ReactiveHashCommands.hGet(ReactiveHashCommands.java:285) |_           Mono.map ⇢ at org.springframework.data.redis.core.DefaultReactiveHashOperations.lambda$get$4(DefaultReactiveHashOperations.java:93) |_     Flux.usingWhen ⇢ at org.springframework.data.redis.core.ReactiveRedisTemplate.doInConnection(ReactiveRedisTemplate.java:196) |_          Mono.from ⇢ at org.springframework.data.redis.core.ReactiveRedisTemplate.createMono(ReactiveRedisTemplate.java:180)

Referenced from: pull request https://github.com/spring-projects/spring-data-redis/pull/516/files