DeadLock | Unlock files and folders | File Utils library

The new version, of react-native-gesture-handler send warning if you use an old API version, but also if one of your package/library use it.

To disable the warning, you can ignore logs.

in your app.js / app.tsx

As per the comments your code attempts to read and write to a map simultaneously and, as per the go 1.6 release notes:

if one goroutine is writing to a map, no other goroutine should be reading or writing the map concurrently

Looking at your code there appears to be no need for this. You can create the channels in advance; after they are created you are only reading from the map so there is no issue:

Assuming that there really aren't any obstacles other than other pedestrians, then the parameter that can help improve your situation is the diameter of the pedestrian. Reducing it means that pedestrians can get closer to each other.

You can also change the diameter dynamically at any point of your simulation using ped.setDiameter( x ). So for example, you can set it to 0 at that specific point in time until the pedestrian leaves that area and change it back to 0.5.

Following the discussion in the comments, it appeared that the issue was not the diameter. Nonetheless, I am keeping it above as it might be the issue for someone facing a similar problem.

The real issue was that the modeler asking the question was making the agent leave the pedestrian flow chart using remove(agent). Once the agent is sent back to the flowchart using an Enter block, AnyLogic no longer recognizes that agent as a pedestrian present in the pedestrian network.

As such, instead of using Enter block, pedEnter should be used. The latter requires as input the location of the pedestrian's appearance. Since in your case the pedestrian is not really moving, just leaving the flowchart for modeling purposes, you can specify the location as the agent's current location as shown below.

You can wait for the group and close the channel in a separate go routine. If the channel is closed, your range over the channel will end after the last sent value has been received.

If you just wait, nothing will receive from the channel. Since the channel is unbuffered, the performTest goroutines won't be able to send. For an unbuffered channel, the send operation will block until it has been received. Therefore, the deferred wg.Done call would never happen, and your program is deadlocked. Since Done is only called after the forever-blocking send has been performed.

In your scheme, because the collectives are started in different threads, they can be started in any order. Having different requests is not enough to disambiguate them: MPI insists that they are started in the same order on each process.

You could fix this by:

You have three deadlocks:

1. errValue := <-errCh // if no errors, i have panic - fatal error: all goroutines are asleep - deadlock!
2. wg.Wait() # line 44
3. errCh <- err # line 29

the second one never happend because of return statement or first deadlock. for fixing deadlock 1, we must read channel with non-blocking mode. for fixing deadlock 2, we must use wg.Done in each goroutine. for fixing deadlock 3, we must use buffered channel or somehow we must consume the channel. here for simplicity I choose buffered channel, but we can read errCh inside for loop and return error if we saw error.

You are better off avoiding serializable isolation level. The way the serializable guarantee is provided is often deadlock prone.

If you can't alter your stored procs to use more targeted locking hints that guarantee the results you require at a lesser isolation level then you can prevent this particular deadlock scenario shown by ensuring that all locks are taken out on ServiceChange first before any are taken out on ServiceChangeParameter.

One way of doing this would be to introduce a table variable in spGetManageServicesRequest and materialize the results of

Found my answer in this thread https://developer.jboss.org/thread/241453. It is a log4j/jboss configuration issue. The fix is to either exclude jboss logging subsystem from jboss deployment configuration or get rid of the console appender. Thanks to Ralph Goers from Log4J team for guiding me towards the jboss thread.

I have closed the issue that I raised to https://issues.apache.org/jira/browse/LOG4J2-3274. The code snippet that I shared in this question was from log4j-1.2 compatibility adapter which doesn't has any impact in my code because I am already using the latest api version.

In the first example, main sleeps long enough to give the child goroutine the opportunity to start and acquire the lock. That goroutine then will merrily exit without releasing the lock.

By the time main resumes its control flow, the shared mutex is locked so the next attempt to acquire it will block forever. Since at this point main is the only routine left alive, blocking forever results in a deadlock.

In the second example, without the call to time.Sleep, main proceeds straight away to acquire the lock. This succeeds, so main goes ahead and exits. The child goroutine would then block forever, but since main has exited, the program just terminates, without deadlock.

By the way, even if main didn't exit, as long as there is at least one goroutine which is not blocking, there's no deadlock. For this purpose, time.Sleep is not a blocking operation, it simply pauses execution for the specified time duration.