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[FAB-3217] SDK Go - Deadlock in Event Hub
Change-Id: I044d136c69a612e0d6c1189a09222fc372434502 Signed-off-by: Bob Stasyszyn <bob.stasyszyn@securekey.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| /* | ||
| Copyright SecureKey Technologies Inc. All Rights Reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package events | ||
|
|
||
| import ( | ||
| "sync/atomic" | ||
| "testing" | ||
|
|
||
| "fmt" | ||
|
|
||
| "time" | ||
|
|
||
| pb "github.com/hyperledger/fabric/protos/peer" | ||
| ) | ||
|
|
||
| func TestDeadlock(t *testing.T) { | ||
| eventHub, clientFactory := createMockedEventHub(t) | ||
| if t.Failed() { | ||
| return | ||
| } | ||
|
|
||
| fmt.Printf("EventHub Concurrency test\n") | ||
|
|
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| client := clientFactory.clients[0] | ||
| if client == nil { | ||
| t.Fatalf("No client") | ||
| } | ||
|
|
||
| threads := 20 | ||
| eventsPerThread := 100 | ||
| eventsSent := eventsPerThread * threads | ||
|
|
||
| // The test should be done in milliseconds but if there's | ||
| // a deadlock then we don't want it to hang | ||
| timeout := 5 * time.Second | ||
|
|
||
| // create a flood of TX events | ||
| txCompletion := newMultiCompletionHandler(eventsSent, timeout) | ||
| go flood(eventsPerThread, threads, func() { | ||
| transactionID := generateTxID() | ||
| received := newCompletionHandler(timeout) | ||
| eventHub.RegisterTxEvent(transactionID, func(txID string, err error) { | ||
| txCompletion.done() | ||
| received.done() | ||
| }) | ||
|
|
||
| go client.MockEvent(&pb.Event{ | ||
| Event: buildMockTxEvent(transactionID), | ||
| }) | ||
|
|
||
| // Wait for the TX event and then unregister | ||
| received.wait() | ||
| eventHub.UnregisterTxEvent(transactionID) | ||
| }) | ||
|
|
||
| // create a flood of CC events | ||
| ccCompletion := newMultiCompletionHandler(eventsSent, timeout) | ||
| go flood(eventsPerThread, threads, func() { | ||
| eventName := generateTxID() | ||
| received := newCompletionHandler(timeout) | ||
| registration := eventHub.RegisterChaincodeEvent("testccid", eventName, func(event *ChaincodeEvent) { | ||
| ccCompletion.done() | ||
| received.done() | ||
| }) | ||
|
|
||
| go client.MockEvent(&pb.Event{ | ||
| Event: buildMockCCEvent("testccid", eventName), | ||
| }) | ||
|
|
||
| // Wait for the CC event and then unregister | ||
| received.wait() | ||
| eventHub.UnregisterChaincodeEvent(registration) | ||
| }) | ||
|
|
||
| // Wait for all events to be received | ||
| txCompletion.wait() | ||
| ccCompletion.wait() | ||
|
|
||
| if txCompletion.numDone() != eventsSent { | ||
| t.Errorf("Sent %d Tx events but received %d - could indicate a deadlock", eventsSent, txCompletion.numDone()) | ||
| } else { | ||
| fmt.Printf("Received all %d TX events.\n", txCompletion.numDone()) | ||
| } | ||
|
|
||
| if ccCompletion.numDone() != eventsSent { | ||
| t.Errorf("Sent %d CC events but received %d - could indicate a deadlock", eventsSent, ccCompletion.numDone()) | ||
| } else { | ||
| fmt.Printf("Received all %d CC events.\n", ccCompletion.numDone()) | ||
| } | ||
| } | ||
|
|
||
| // completionHandler waits for a single event with a timeout | ||
| type completionHandler struct { | ||
| completed chan bool | ||
| timeout time.Duration | ||
| } | ||
|
|
||
| // newCompletionHandler creates a new completionHandler | ||
| func newCompletionHandler(timeout time.Duration) *completionHandler { | ||
| return &completionHandler{ | ||
| timeout: timeout, | ||
| completed: make(chan bool), | ||
| } | ||
| } | ||
|
|
||
| // wait will wait until the task(s) has completed or until the timeout | ||
| func (c *completionHandler) wait() { | ||
| select { | ||
| case <-c.completed: | ||
| case <-time.After(c.timeout): | ||
| } | ||
| } | ||
|
|
||
| // done marks the task as completed | ||
| func (c *completionHandler) done() { | ||
| c.completed <- true | ||
| } | ||
|
|
||
| // multiCompletionHandler waits for multiple tasks to complete | ||
| type multiCompletionHandler struct { | ||
| completionHandler | ||
| expected int32 | ||
| numCompleted int32 | ||
| } | ||
|
|
||
| // newMultiCompletionHandler creates a new multiCompletionHandler | ||
| func newMultiCompletionHandler(expected int, timeout time.Duration) *multiCompletionHandler { | ||
| return &multiCompletionHandler{ | ||
| expected: int32(expected), | ||
| completionHandler: completionHandler{ | ||
| timeout: timeout, | ||
| completed: make(chan bool), | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // done marks a task as completed | ||
| func (c *multiCompletionHandler) done() { | ||
| doneSoFar := atomic.AddInt32(&c.numCompleted, 1) | ||
| if doneSoFar >= c.expected { | ||
| c.completed <- true | ||
| } | ||
| } | ||
|
|
||
| // numDone returns the nmber of tasks that have completed | ||
| func (c *multiCompletionHandler) numDone() int { | ||
| return int(c.numCompleted) | ||
| } | ||
|
|
||
| // flood invokes the given function in the given number of threads, | ||
| // the given number of times per thread | ||
| func flood(invocationsPerThread int, threads int, f func()) { | ||
| for t := 0; t < threads; t++ { | ||
| go func() { | ||
| for i := 0; i < invocationsPerThread; i++ { | ||
| f() | ||
| } | ||
| }() | ||
| } | ||
| } |
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