Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 3 years ago.
Improve this question
I wrote a pool of workers, where the job is to receive an integer and return that number converted to string. However I faced a fatal error: all goroutines are asleep - deadlock! error. What am I doing wrong and how can I fix it?
https://play.golang.org/p/U814C2rV5na
I was able to replicate your issue and fix it by using a pointer to master instead of a normal variable.
Basically just change your NewWorker() method to this:
func (m *Master) NewWorker() {
m.Workers = append(m.Workers, Worker{})
}
Here's the output the program prints after the change:
0
1
2
3
4
5
6
7
8
9
10
.
.
.
Reason:
Everytime you called NewWorker() method, you weren't appending a worker to the same master object. That's why the slice never got populated with 3 workers, as should've been the case.
Go Playground
Related
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 1 year ago.
Improve this question
I need to run my Co program continuously with five minute interval.
I tried using gocron but the program is not giving any output.
func hi() {
fmt.Println("hi")
}
func main() {
gocron.Every(5).Minute().Do(hi)
}
I expect this to run and print "hi" at every 5 min interval.
Your code is only setup a rule and immediately exits. You have to start the scheduler which will run the assigned jobs.
scheduler := gocron.NewScheduler(time.UTC)
scheduler.Every(5).Minute().Do(hi)
scheduler.StartBlocking()
This way the scheduler will block the program until its stopped (by Ctrl-C for example).
See the documentation for more info.
Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 2 years ago.
Improve this question
what wrong with that ? I wanna del redis key in laravel but it doesn't work .it return queue statusenter image description here
queued response is used in redis transactions. When you start a transaction with multi every command you execute will be queued until you exec it.
> MULTI
OK
> INCR foo
QUEUED
> INCR bar
QUEUED
> EXEC
1) (integer) 1
2) (integer) 1
Probably in your code, exec part is missing or you may remove multi before executing your command.
Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 7 years ago.
Improve this question
I am encountering this error again and again in my tibco code.Somebody please tell how to solve this error
I am using tibco 5.7.3.
JDBC error reported: (SQLState = HY000) - java.sql.SQLException: [tibcosoftwareinc][SQLServer JDBC Driver]Object has been closed."
When a JDBC Query activity is configured to query in subset mode, the resultSet object is kept in the engine for subsequent iterations. Typically the resultSet object will only be closed and cleared from the engine if there is no more data left. However, keep in mind that the default connection idleTimeout is set to 5 minutes. This means that after 5 minutes of no activity the connection will get released. So if you wait longer than the idleTimeout value to retrieve subsequent subsets you will incur this exception since the connection has been closed and hence the resultset is no longer available.
Resolution:
Set Engine.DBConnection.idleTimeout to higher value in the Businessworks engine TRA file, say, 20 minutes so this connection can remain idle without getting released for next iterations for example: Engine.DBConnection.idleTimeout=20. For more details on this setting please see the list of Available Custom Engine Properties.
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 10 years ago.
Improve this question
I have a traffic capture from what I believe is a windows client. I've noticed that from time to time it sends what are identified by Wireshark as "TCP Keep-Alive", but instead of just setting ACK and sending no data, it backs up SEQ by one octet and resends that data.
(C = client, S = server, relative seq / ack)
(connected, data transferred back and forth)
1 C: PSH Seq=21, Ack=41, Len=12
2 S: PSH ACK Seq=41, Ack=33, Len=12
3 C: ACK Seq=33, Ack=53
4 S: PSH ACK Seq=53, Ack=33, Len=1
5 C: ACK Seq=33, Ack=54
... 3 seconds pass ...
6 C: ACK Seq=32, Ack=54, Len=1 (resends the last octet from #1)
7 S: ACK Seq=54, Ack=33
...
Is this the normal behaviour for the windows stack when sending TCP keepalives?
That's what a keep-alive segment is. It isn't a separate piece of protocol, it's just a redundant send with a sequence number that has already been acknowledged, to provoke an ACK with the current sequence number in reply. There's no requirement that it set the PSH flag either.
This question already has an answer here:
tailable cursor in mongo db timing out
(1 answer)
Closed 9 years ago.
How to specify a no-timeout option on the cursor?
I can run the job manually and from my laptop but something is going on the server and all the time I am getting this error:
MONGODB cursor.refresh() for cursor xxx
Query response returned CURSOR_NOT_FOUND. Either an invalid cursor was specified, or the cursor may have timed out on the server.
MONGODB cursor.refresh() for cursor yyy
The job is ran from a ruby scheduler file that and is specified as a namespace in rake
rake is calling for another ruby module in the middle, and the job dies during the execution of this module
I asked this question earlier and it got downvoted. Please, instead of downvoting explain what is so stupid about it, because I really need to solve this problem and can't figure out what is going on.
The server is kind of experimental and does not have any monitoring tools. But it seems to be reliable. And there are no other jobs running.
See the FAQ for the Ruby MongoDB driver for details on how to turn off the cursor timeout.
Example from there:
#collection.find({}, :timeout => false) do |cursor|
cursor.each do |document
# Process documents here
end
end