Backport #22146
There are a few places in FlushQueueWithContext which make an incorrect
assumption about how `select` on multiple channels works.
The problem is best expressed by looking at the following example:
```go
package main
import "fmt"
func main() {
closedChan := make(chan struct{})
close(closedChan)
toClose := make(chan struct{})
count := 0
for {
select {
case <-closedChan:
count++
fmt.Println(count)
if count == 2 {
close(toClose)
}
case <-toClose:
return
}
}
}
```
This PR double-checks that the contexts are closed outside of checking
if there is data in the dataChan. It also rationalises the WorkerPool
FlushWithContext because the previous implementation failed to handle
pausing correctly. This will probably fix the underlying problem in
#22145
Fix #22145
Signed-off-by: Andrew Thornton <art27@cantab.net>
A testing cleanup.
This pull request replaces `os.MkdirTemp` with `t.TempDir`. We can use the `T.TempDir` function from the `testing` package to create temporary directory. The directory created by `T.TempDir` is automatically removed when the test and all its subtests complete.
This saves us at least 2 lines (error check, and cleanup) on every instance, or in some cases adds cleanup that we forgot.
Reference: https://pkg.go.dev/testing#T.TempDir
```go
func TestFoo(t *testing.T) {
// before
tmpDir, err := os.MkdirTemp("", "")
require.NoError(t, err)
defer os.RemoveAll(tmpDir)
// now
tmpDir := t.TempDir()
}
```
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
- Doing 64-bit atomic operations on 32-bit machines is a bit tricky by
golang, as they can only be done under certain set of
conditions(https://pkg.go.dev/sync/atomic#pkg-note-BUG).
- This PR fixes such case whereby the conditions weren't met, it moves
the int64 to the first field of the struct, which will 64-bit operations
happening on this property on 32-bit machines.
- Resolves #19518
There appears to be an intermittent NPE in queue tests relating to the deferred
shutdown/terminate functions.
This PR more formally asserts that shutdown and termination occurs before starting
and finishing the tests but leaves the defer in place to ensure that if there is an
issue shutdown/termination will occur.
Signed-off-by: Andrew Thornton <art27@cantab.net>
Continues on from #19202.
Following the addition of pprof labels we can now more easily understand the relationship between a goroutine and the requests that spawn them.
This PR takes advantage of the labels and adds a few others, then provides a mechanism for the monitoring page to query the pprof goroutine profile.
The binary profile that results from this profile is immediately piped in to the google library for parsing this and then stack traces are formed for the goroutines.
If the goroutine is within a context or has been created from a goroutine within a process context it will acquire the process description labels for that process.
The goroutines are mapped with there associate pids and any that do not have an associated pid are placed in a group at the bottom as unbound.
In this way we should be able to more easily examine goroutines that have been stuck.
A manager command `gitea manager processes` is also provided that can export the processes (with or without stacktraces) to the command line.
Signed-off-by: Andrew Thornton <art27@cantab.net>
Add number in queue status to the monitor page so that administrators can
assess how much work is left to be done in the queues.
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
* Simplify Boost/Pause logic
#18658 has added a check to see if we need to boost because there is still work to do
however the check is slightly complex and not ideal. There's no point boosting if
the queue is paused or can't scale. Therefore merge the two selects into one and add
a check to p.paused.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* And on resume add a zeroboost if necessary
Signed-off-by: Andrew Thornton <art27@cantab.net>
* simplify
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>
* Restart zero worker if there is still work to do
It is possible for the zero worker to timeout before all the work is finished.
This may mean that work may take a long time to complete because a worker will only
be induced on repushing.
Also ensure that requested count is reset after pulls and push mirror sync requests and add some more trace logging to the queue push.
Fix #18607
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Only attempt to flush queue if the underlying worker pool is not finished
There is a possible race whereby a worker pool could be cancelled but yet the
underlying queue is not empty. This will lead to flush-all cycling because it
cannot empty the pool.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Apply suggestions from code review
Co-authored-by: Gusted <williamzijl7@hotmail.com>
Co-authored-by: Gusted <williamzijl7@hotmail.com>
* Change some logging levels
* PlainTextWithBytes - 4xx/5xx this should just be TRACE
* notFoundInternal - the "error" here is too noisy and should be DEBUG
* WorkerPool - Worker pool scaling messages are normal and should be DEBUG
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
* Attempt to prevent the deadlock in the QueueDiskChannel Test again
This time we're going to adjust the pause tests to only test the right
flag.
* Only switch off pushback once we know that we are not pushing anything else
* Ensure full redirection occurs
* More nicely handle a closed datachan
* And handle similar problems in queue_channel_test
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Prevent deadlocks in persistable channel pause test
Because of reuse of the old paused/resumed channels in this test there
was a potential for deadlock. This PR ensures that the channels are always
reobtained.
It further adds some control code to detect hangs in future - and it
ensures that the pausing warning is not shown on shutdown.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* do not warn but do pause
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Start adding mechanism to return unhandled data
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Create pushback interface
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Add Pausable interface to WorkerPool and Manager
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Implement Pausable and PushBack for the bytefifos
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Implement Pausable and Pushback for ChannelQueues and ChannelUniqueQueues
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Wire in UI for pausing
Signed-off-by: Andrew Thornton <art27@cantab.net>
* add testcases and fix a few issues
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix build
Signed-off-by: Andrew Thornton <art27@cantab.net>
* prevent "race" in the test
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix jsoniter mismerge
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix conflicts
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix format
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Add warnings for no worker configurations and prevent data-loss with redis/levelqueue
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Use StopTimer
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
* Prevent deadlock in TestPersistableChannelQueue
There is a potential deadlock in TestPersistableChannelQueue due to attempting to
shutdown the test queue before it is ready.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* prevent npe
Signed-off-by: Andrew Thornton <art27@cantab.net>
Convert the old mirror syncing queue to the more modern queue format.
Fix a bug in the from the repo-archive queue PR - the assumption was made that uniqueness could be enforced with by checking equality in a map in channel unique queues - however this only works for primitive types - which was the initial intention but is an imperfect. This is fixed by marshalling the data and placing the martialled data in the unique map instead.
The documentation is also updated to add information about the deprecated configuration values.
Signed-off-by: Andrew Thornton <art27@cantab.net>
The io/ioutil package has been deprecated as of Go 1.16, see
https://golang.org/doc/go1.16#ioutil. This commit replaces the existing
io/ioutil functions with their new definitions in io and os packages.
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
* Timeout on flush in testing
At the end of each test the queues are flushed. At present there is no limit on the
length of time a flush can take which can lead to long flushes.
However, if the CI task is cancelled we lose the log information as to where the long
flush was taking place.
This PR simply adds a default time limit of 2 minutes - at which point an error will
be produced. This should allow us to more easily find the culprit.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* return better error
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
A race has been detected in #1441 relating to getting log levels.
This PR protects the GetLevel and GetStacktraceLevel calls with a RW mutex.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Prevent race in TestPersistableChannelQueue
A slight race has become apparent in the TestPersistableChannelQueue.
This PR simply adds locking to prevent the race.
* make print value of "$(GOTESTFLAGS)" on test-backend and unit-test-coverage
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
* move shutdownfns, terminatefns and hammerfns out of separate goroutines
Coalesce the shutdownfns etc into a list of functions that get run at shutdown
rather then have them run at goroutines blocked on selects.
This may help reduce the background select/poll load in certain
configurations.
* The LevelDB queues can actually wait on empty instead of polling
Slight refactor to cause leveldb queues to wait on empty instead of polling.
* Shutdown the shadow level queue once it is empty
* Remove bytefifo additional goroutine for readToChan as it can just be run in run
* Remove additional removeWorkers goroutine for workers
* Simplify the AtShutdown and AtTerminate functions and add Channel Flusher
* Add shutdown flusher to CUQ
* move persistable channel shutdown stuff to Shutdown Fn
* Ensure that UPCQ has the correct config
* handle shutdown during the flushing
* reduce risk of race between zeroBoost and addWorkers
* prevent double shutdown
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Queue manager FlushAll can loop rapidly - add delay
Add delay within FlushAll to prevent rapid loop when workers are busy
Signed-off-by: Andrew Thornton <art27@cantab.net>
* as per lunny
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
This PR is another in the vein of queue improvements. It suggests an
exponential backoff for bytefifo queues to reduce the load from queue
polling. This will mostly be useful for redis queues.
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>
There is a potential race in TestChannelQueue_Batch due to boost workers starting up
This PR simply removes the boosts from this test.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* The leveldb shadow queue of a persistable channel queue should always start with 0
workers and just use boost to add additional workers if necessary.
* create a zero boost so that if there are no workers in a pool - boost to start the workers
* actually set timeout appropriately on boosted workers
Signed-off-by: Andrew Thornton <art27@cantab.net>
The issue is that the TestPatch will reset the PR MergeBase - and it is possible for TestPatch to update the MergeBase whilst a merge is ongoing. The ensuing merge will then complete but it doesn't re-set the MergeBase it used to merge the PR.
Fixes the intermittent error in git test.
Signed-off-by: Andrew Thornton art27@cantab.net
* _ to unused func options
* rm useless brakets
* rm trifial non used models functions
* rm dead code
* rm dead global vars
* fix routers/api/v1/repo/issue.go
* dont overload import module
There is potentially a race with a slow starting internal
queue causing a NPE if Has is checked before the internal
queue has been setup.
This PR adds a lock on the Has() fn.
Fix #14311
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Update go-redis to v8.4.0
* github.com/go-redis/redis/v8 v8.4.0 -> v8.5.0
* Apply suggestions from code review
Co-authored-by: zeripath <art27@cantab.net>
* TODO
* Use the Queue termination channel as the default context for pushes
Signed-off-by: Andrew Thornton <art27@cantab.net>
* missed one
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: zeripath <art27@cantab.net>
* Allow common redis and leveldb connections
Prevents multiple reopening of redis and leveldb connections to the same
place by sharing connections.
Further allows for more configurable redis connection type using the
redisURI and a leveldbURI scheme.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* add unit-test
Signed-off-by: Andrew Thornton <art27@cantab.net>
* as per @lunny
Signed-off-by: Andrew Thornton <art27@cantab.net>
* add test
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Update modules/cache/cache_redis.go
* Update modules/queue/queue_disk.go
* Update modules/cache/cache_redis.go
* Update modules/cache/cache_redis.go
* Update modules/queue/unique_queue_disk.go
* Update modules/queue/queue_disk.go
* Update modules/queue/unique_queue_disk.go
* Update modules/session/redis.go
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lauris BH <lauris@nix.lv>
Replace all calls to os.Remove/os.RemoveAll by retrying util.Remove/util.RemoveAll and remove circular dependencies from util.
Fix #12339
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: silverwind <me@silverwind.io>
* Remove spurious spacing between Maintenance Operations and its table on dashboard
* Prevent (EXTRA string) comments in Task headers
* Redirect tasks started from monitor page back to monitor
* Fix #12107 - redirects from process cancel should use AppSubUrl
* When wrapping queues set the name correctly
Signed-off-by: Andrew Thornton <art27@cantab.net>
There is a potential memory leak in `Workerpool` due to the intricacies of
`time.Timer` stopping.
Whenever a `time.Timer` is `Stop`ped its channel must be cleared using a
`select` if the result of the `Stop()` is `false`.
Unfortunately in `Workerpool` these were checked the wrong way round.
However, there were a few other places that were not being checked.
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
