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relay(dm): cancel when relay meet error to close goroutine (#6803) #6814

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merged 3 commits into from
Aug 23, 2022
Merged

relay(dm): cancel when relay meet error to close goroutine (#6803) #6814

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c1817b5
This is an automated cherry-pick of #6803
lance6716 Aug 19, 2022
2be54aa
fix conflict
lance6716 Aug 22, 2022
b6803ee
fix CI
lance6716 Aug 22, 2022
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1 change: 1 addition & 0 deletions dm/dm/worker/relay.go
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,7 @@ func (h *realRelayHolder) run() {
h.setResult(nil) // clear previous result

r := h.relay.Process(h.ctx)
h.cancel()

h.setResult(&r)
for _, err := range r.Errors {
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6 changes: 5 additions & 1 deletion dm/relay/relay.go
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Expand Up @@ -570,7 +570,11 @@ func (r *Relay) handleEvents(
// 1. read events from upstream server
readTimer := time.Now()
rResult, err := reader2.GetEvent(ctx)
failpoint.Inject("RelayGetEventFailed", func(v failpoint.Value) {

failpoint.Inject("RelayGetEventFailed", func() {
err = errors.New("RelayGetEventFailed")
})
failpoint.Inject("RelayGetEventFailedAt", func(v failpoint.Value) {
if intVal, ok := v.(int); ok && intVal == eventIndex {
err = errors.New("fail point triggered")
_, gtid := r.meta.GTID()
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2 changes: 1 addition & 1 deletion dm/tests/duplicate_event/run.sh
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Expand Up @@ -41,7 +41,7 @@ function run_with_prepared_source_config() {

# with a 5 rows insert txn: 1 * FormatDesc + 1 * PreviousGTID + 1 * GTID + 1 * BEGIN + 5 * (Table_map + Write_rows) + 1 * XID
# here we fail at the third write rows event, sync should retry and auto recover without any duplicate event
export GO_FAILPOINTS="github.com/pingcap/tiflow/dm/relay/RelayGetEventFailed=return(3);github.com/pingcap/tiflow/dm/relay/RelayAllowRetry=return"
export GO_FAILPOINTS="github.com/pingcap/tiflow/dm/relay/RelayGetEventFailedAt=return(3);github.com/pingcap/tiflow/dm/relay/RelayAllowRetry=return"

run_dm_worker $WORK_DIR/worker2 $WORKER2_PORT $cur/conf/dm-worker2.toml
check_rpc_alive $cur/../bin/check_worker_online 127.0.0.1:$WORKER2_PORT
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36 changes: 36 additions & 0 deletions dm/tests/new_relay/run.sh
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Expand Up @@ -159,6 +159,38 @@ function test_restart_relay_status() {
"bound" 2
}

function test_relay_leak() {
cleanup_process
cleanup_data $TEST_NAME
export GO_FAILPOINTS="github.com/pingcap/tiflow/dm/relay/RelayGetEventFailed=return()"

run_dm_master $WORK_DIR/master $MASTER_PORT $cur/conf/dm-master.toml
check_rpc_alive $cur/../bin/check_master_online 127.0.0.1:$MASTER_PORT
run_dm_worker $WORK_DIR/worker1 $WORKER1_PORT $cur/conf/dm-worker1.toml
check_rpc_alive $cur/../bin/check_worker_online 127.0.0.1:$WORKER1_PORT

cp $cur/conf/source1.yaml $WORK_DIR/source1.yaml
sed -i "/check-enable: false/d" $WORK_DIR/source1.yaml
sed -i "/checker:/d" $WORK_DIR/source1.yaml
dmctl_operate_source create $WORK_DIR/source1.yaml $SOURCE_ID1

run_dm_ctl_with_retry $WORK_DIR "127.0.0.1:$MASTER_PORT" \
"start-relay -s $SOURCE_ID1 worker1"

run_dm_ctl_with_retry $WORK_DIR "127.0.0.1:$MASTER_PORT" \
"query-status -s $SOURCE_ID1" \
"RelayGetEventFailed" 1

check_log_contain_with_retry 'dispatch auto resume relay' $WORK_DIR/worker1/log/dm-worker.log

count=$(curl "http://127.0.0.1:8262/debug/pprof/goroutine?debug=2" 2>/dev/null | grep -c doIntervalOps || true)
if [ $count -gt 1 ]; then
echo "relay goroutine leak detected, count expect 1 but got $count"
exit 1
fi
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>test test_relay_leak passed"
}

function test_kill_dump_connection() {
cleanup_data $TEST_NAME
cleanup_process
Expand Down Expand Up @@ -202,6 +234,10 @@ function run() {
test_restart_relay_status
test_cant_dail_downstream
test_cant_dail_upstream
test_relay_leak

cleanup_process
cleanup_data $TEST_NAME

export GO_FAILPOINTS="github.com/pingcap/tiflow/dm/relay/ReportRelayLogSpaceInBackground=return(1)"

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