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util/eventbus: log goroutine stacks when hung in CI

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Updates #17680

Change-Id: Ie48dc2d64b7583d68578a28af52f6926f903ca4f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-11-10 15:44:55 -08:00
committed by Brad Fitzpatrick
parent 42ce5c88be
commit 1eba5b0cbd
9 changed files with 15 additions and 8 deletions
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2
cmd/derper/depaware.txt
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@@ -139,7 +139,7 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
tailscale.com/types/structs from tailscale.com/ipn+
tailscale.com/types/tkatype from tailscale.com/client/local+
tailscale.com/types/views from tailscale.com/ipn+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/net/netmon
tailscale.com/util/cloudenv from tailscale.com/hostinfo+
tailscale.com/util/ctxkey from tailscale.com/tsweb+

2
cmd/k8s-operator/depaware.txt
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@@ -848,7 +848,7 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
tailscale.com/types/views from tailscale.com/appc+
tailscale.com/util/backoff from tailscale.com/cmd/k8s-operator+
tailscale.com/util/checkchange from tailscale.com/ipn/ipnlocal+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/cmd/k8s-operator+
tailscale.com/util/cloudenv from tailscale.com/hostinfo+
LW tailscale.com/util/cmpver from tailscale.com/net/dns+

2
cmd/tailscale/depaware.txt
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@@ -171,7 +171,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
tailscale.com/types/structs from tailscale.com/ipn+
tailscale.com/types/tkatype from tailscale.com/types/key+
tailscale.com/types/views from tailscale.com/tailcfg+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/net/netcheck+
tailscale.com/util/cloudenv from tailscale.com/net/dnscache+
tailscale.com/util/cmpver from tailscale.com/net/tshttpproxy+

2
cmd/tailscaled/depaware-min.txt
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@@ -144,7 +144,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/types/views from tailscale.com/appc+
tailscale.com/util/backoff from tailscale.com/control/controlclient+
tailscale.com/util/checkchange from tailscale.com/ipn/ipnlocal+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/appc+
tailscale.com/util/cloudenv from tailscale.com/hostinfo+
tailscale.com/util/ctxkey from tailscale.com/client/tailscale/apitype+

2
cmd/tailscaled/depaware-minbox.txt
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@@ -171,7 +171,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/types/views from tailscale.com/appc+
tailscale.com/util/backoff from tailscale.com/control/controlclient+
tailscale.com/util/checkchange from tailscale.com/ipn/ipnlocal+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/appc+
tailscale.com/util/cloudenv from tailscale.com/hostinfo+
tailscale.com/util/cmpver from tailscale.com/clientupdate

2
cmd/tailscaled/depaware.txt
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@@ -416,7 +416,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/types/views from tailscale.com/ipn/ipnlocal+
tailscale.com/util/backoff from tailscale.com/cmd/tailscaled+
tailscale.com/util/checkchange from tailscale.com/ipn/ipnlocal+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/control/controlclient+
tailscale.com/util/cloudenv from tailscale.com/net/dns/resolver+
tailscale.com/util/cmpver from tailscale.com/net/dns+

2
cmd/tsidp/depaware.txt
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@@ -253,7 +253,7 @@ tailscale.com/cmd/tsidp dependencies: (generated by github.com/tailscale/depawar
tailscale.com/types/views from tailscale.com/appc+
tailscale.com/util/backoff from tailscale.com/control/controlclient+
tailscale.com/util/checkchange from tailscale.com/ipn/ipnlocal+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/appc+
tailscale.com/util/cloudenv from tailscale.com/hostinfo+
LW tailscale.com/util/cmpver from tailscale.com/net/dns+

2
tsnet/depaware.txt
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@@ -248,7 +248,7 @@ tailscale.com/tsnet dependencies: (generated by github.com/tailscale/depaware)
tailscale.com/types/views from tailscale.com/appc+
tailscale.com/util/backoff from tailscale.com/control/controlclient+
tailscale.com/util/checkchange from tailscale.com/ipn/ipnlocal+
tailscale.com/util/cibuild from tailscale.com/health
tailscale.com/util/cibuild from tailscale.com/health+
tailscale.com/util/clientmetric from tailscale.com/appc+
tailscale.com/util/cloudenv from tailscale.com/hostinfo+
LW tailscale.com/util/cmpver from tailscale.com/net/dns+

7
util/eventbus/subscribe.go
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@@ -7,10 +7,12 @@
"context"
"fmt"
"reflect"
"runtime"
"sync"
"time"
"tailscale.com/types/logger"
"tailscale.com/util/cibuild"
)
type DeliveredEvent struct {
@@ -329,6 +331,11 @@ func (s *SubscriberFunc[T]) dispatch(ctx context.Context, vals *queue[DeliveredE
select {
case <-s.slow.C:
s.logf("giving up on subscriber for %T after %v at close", t, time.Since(start))
if cibuild.On() {
all := make([]byte, 2<<20)
n := runtime.Stack(all, true)
s.logf("goroutine stacks:\n%s", all[:n])
}
case <-callDone:
}
return false