Thread gets stuck when trying to acquire lock via tryLock()

Expected behavior The thread should get release i.e tryLock should return false

Actual behavior Thread gets stuck in Waiting state

Steps to reproduce or test case This is how we are calling the tryLock and multiple threads are scheduled to call this. Some threads gets stuck at the Waiting state at tryLock. This is observed when the shards are being added (Sharding is In Progress state). After sharding is done then Restarting the application releases the threads. `

  RLock lock = redissonClient.getLock("KEY");
  try {
    if (lock.tryLock(0, 5, MINUTES)) { // NOSONAR
      orgsToUpdate.remove(firstOrgId);
      return new OrgToUpdate(firstOrgId, lock);
    }
    
  } catch (final InterruptedException e) { 
    if (lock.isHeldByCurrentThread()) {
      lock.unlock();
    }
    return null;
  }`

Redis version AWS Elastic Cache Engine Version 5.0.5 Redisson version 3.13.1 and 3.13.2 (Tested on both same issue) Redisson configuration I have tried multiple configurations:

1. Default Config of 3.13.1

connectTimeout=10000 masterConnectionPoolSize=64 slaveConnectionPoolSize=64 subscriptionConnectionPoolSize=50 retryAttempts=3 masterConnectionMinimumIdleSize=24 slaveConnectionMinimumIdleSize=24 subscriptionConnectionMinimumIdleSize=1 nettyThreads=32 idleConnectionTimeout=10000 subscriptionsPerConnection=5

1. Custom

connectTimeout=20000 masterConnectionPoolSize=128 slaveConnectionPoolSize=128 subscriptionConnectionPoolSize=128 retryAttempts=5 masterConnectionMinimumIdleSize=128 slaveConnectionMinimumIdleSize=128 subscriptionConnectionMinimumIdleSize=128 nettyThreads=64 idleConnectionTimeout=10000 subscriptionsPerConnection=50

Thread Dump:

“cron-thread-8” 142 prio=5 os_prio=0 cpu=53374.16ms elapsed=65618.51s tid=0x00007fc22dfc0800 nid=0x249b in Object.wait() [0x00007fc0ad4da000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(java.base@11.0.3/Native Method)
- waiting on <no object reference available>
at java.lang.Object.wait(java.base@11.0.3/Object.java:328)
at io.netty.util.concurrent.DefaultPromise.await(DefaultPromise.java:218)
- waiting to re-lock in wait() <0x00000000abbdba00> (a io.netty.util.concurrent.ImmediateEventExecutor$ImmediatePromise)
at org.redisson.misc.RedissonPromise.await(RedissonPromise.java:110)
at org.redisson.misc.RedissonPromise.await(RedissonPromise.java:35)
at org.redisson.command.CommandAsyncService.get(CommandAsyncService.java:139)
at org.redisson.RedissonObject.get(RedissonObject.java:90)
at org.redisson.RedissonLock.tryAcquire(RedissonLock.java:221)
at org.redisson.RedissonLock.tryLock(RedissonLock.java:394)
at com.adobe.quotaservice.redis.QuotaUpdateCache.findOrgToUpdate(QuotaUpdateCache.java:343)
at com.adobe.quotaservice.redis.QuotaUpdateCache.findOrgToUpdateAndUpdate(QuotaUpdateCache.java:196)
at com.adobe.quotaservice.redis.QuotaUpdateCache$$FastClassBySpringCGLIB$$2b64b1f9.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:750)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
at com.adobesc.monitoring.transaction.log.LogTransactionAspect.transactionPointcut(LogTransactionAspect.java:82)
at jdk.internal.reflect.GeneratedMethodAccessor138.invoke(Unknown Source)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@11.0.3/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@11.0.3/Method.java:566)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)

[akshitjain]

@mrniko Any help on this?

[mrniko]

FIxed! Thanks for report