sweep increased allocation count with v1.3.4 #214

Roasbeef · 2020-04-03T21:46:39Z

After updating our project to the latest version of bbolt which includes #201, we've started running into this runtime error in our tests:

runtime: nelems=21 nalloc=3 previous allocCount=2 nfreed=65535
fatal error: sweep increased allocation count
runtime stack:
runtime.throw(0xc2ecf1, 0x20)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/panic.go:774 +0x72
runtime.(*mspan).sweep(0x7f399ffced10, 0x7f399ffced00, 0x455700)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/mgcsweep.go:328 +0x8e1
runtime.(*mcentral).uncacheSpan(0x11e9d60, 0x7f399ffced10)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/mcentral.go:197 +0x79
runtime.(*mcache).releaseAll(0x7f39a00cd008)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/mcache.go:158 +0x6b
runtime.(*mcache).prepareForSweep(0x7f39a00cd008)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/mcache.go:185 +0x46
runtime.acquirep(0xc000042000)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/proc.go:4114 +0x3d
runtime.stopm()
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/proc.go:1930 +0xe8
runtime.gcstopm()
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/proc.go:2125 +0xb4
runtime.schedule()
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/proc.go:2481 +0x473
runtime.exitsyscall0(0xc000001680)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/proc.go:3141 +0x116
runtime.mcall(0x800000)
	/home/travis/.gimme/versions/go1.13.linux.amd64/src/runtime/asm_amd64.s:318 +0x5b

So far, it only seems to happen about every 1 in 5 test runs. At first we were running the tests with Go 1.14, then tried to go back to version 1.13, but the issue would still pop up. Only after downgrading to bbolt v1.3.3 does the issue seem to disappear. Given that the issue seems to persist using the last two major versions of Go, it may be the case that #201 uncovered another underlying issue, or the changes in the PR are actually triggering this new error.

We're working on creating a reproducible program to trigger this warning.

The full trace of this error in our tests can be found here: https://paste.ubuntu.com/p/XNgrZ49dbw/

The text was updated successfully, but these errors were encountered:

mdogan · 2020-04-04T13:30:02Z

I have started to see the same issue after upgrading to v1.3.4. And it's appearing on my Github workflow builds very frequently. But I was able to reproduce on my dev machine only once.

 runtime: nelems=73 nalloc=5 previous allocCount=4 nfreed=65535
 fatal error: sweep increased allocation count

 runtime stack:
 runtime.throw(0x78eb89, 0x20)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/panic.go:1114 +0x72
 runtime.(*mspan).sweep(0x7f09586fc868, 0x7f09586fc800, 0x432300)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/mgcsweep.go:328 +0x8b8
 runtime.(*mcentral).uncacheSpan(0xa50b78, 0x7f09586fc868)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/mcentral.go:197 +0x79
 runtime.(*mcache).releaseAll(0x7f0982675108)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/mcache.go:158 +0x6b
 runtime.(*mcache).prepareForSweep(0x7f0982675108)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/mcache.go:185 +0x46
 runtime.acquirep(0xc000024000)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/proc.go:4278 +0x3d
 runtime.stopm()
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/proc.go:1830 +0xe8
 runtime.gcstopm()
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/proc.go:2028 +0xb4
 runtime.schedule()
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/proc.go:2469 +0x497
 runtime.goschedImpl(0xc000001680)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/proc.go:2705 +0xd6
 runtime.gopreempt_m(0xc000001680)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/proc.go:2733 +0x34
 runtime.newstack()
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/stack.go:1025 +0x1ae
 runtime.morestack()
 	/opt/hostedtoolcache/go/1.14.1/x64/src/runtime/asm_amd64.s:449 +0x8f

 goroutine 39 [runnable]:
 go.etcd.io/bbolt.(*Tx).write(0xc001dc2000, 0x882cc4d2, 0xa281a0)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:589 +0x3f7
 go.etcd.io/bbolt.(*Tx).Commit(0xc001dc2000, 0x0, 0x0)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:186 +0x204
 go.etcd.io/bbolt.(*DB).Update(0xc0002a9800, 0xc000337ec0, 0x0, 0x0)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/db.go:701 +0xf6
 github.com/xyz/qwe/persistence.(*Store).Delete(0xc0003549c0, 0xc001d63710, 0x6, 0xc001d63708, 0x3)
 	/home/runner/work/xyz/qwe/persistence/bolt.go:186 +0x6b
 github.com/xyz/qwe/persistence.Test_Store_DataSize(0xc0000cafc0)
 	/home/runner/work/xyz/qwe/persistence/bolt_test.go:199 +0x239
 testing.tRunner(0xc0000cafc0, 0x79e3f8)
 	/opt/hostedtoolcache/go/1.14.1/x64/src/testing/testing.go:992 +0xdc
 created by testing.(*T).Run
 	/opt/hostedtoolcache/go/1.14.1/x64/src/testing/testing.go:1043 +0x357

 goroutine 6 [runnable]:
 go.etcd.io/bbolt.(*Tx).checkBucket.func1(0x7f095898b000, 0x1)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:477 +0xed
 go.etcd.io/bbolt.(*Tx).forEachPage(0xc000210700, 0xd, 0x1, 0xc000040c30)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:637 +0x80
 go.etcd.io/bbolt.(*Tx).forEachPage(0xc000210700, 0x1d, 0x0, 0xc000040c30)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:643 +0xd8
 go.etcd.io/bbolt.(*Tx).checkBucket(0xc000210700, 0xc000012440, 0xc000040ed0, 0xc000040f00, 0xc0000801e0)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:466 +0xd4
 go.etcd.io/bbolt.(*Tx).checkBucket.func2(0x7f095899d020, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:491 +0xc0
 go.etcd.io/bbolt.(*Bucket).ForEach(0xc000210718, 0xc000040d58, 0x0, 0xc000035d88)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/bucket.go:390 +0xfe
 go.etcd.io/bbolt.(*Tx).checkBucket(0xc000210700, 0xc000210718, 0xc000035ed0, 0xc000035f00, 0xc0000801e0)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:489 +0x146
 go.etcd.io/bbolt.(*Tx).check(0xc000210700, 0xc0000801e0)
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:445 +0x556
 created by go.etcd.io/bbolt.(*Tx).Check
 	/home/runner/go/pkg/mod/go.etcd.io/[email protected]/tx.go:415 +0x67

tmm1 · 2020-04-04T17:59:53Z

Since the crash seems to happen inside the golang runtime, I think it would be wise to open an issue on golang/go as well to put it on their radar

liggitt · 2020-04-04T19:48:37Z

cc @jpbetz

mxpv · 2020-04-05T06:12:57Z

We can confirm this happening in containerd after recent upgrade to 1.3.4 as well

jrick · 2020-04-06T15:15:26Z

Can others test https://github.com/jrick/bbolt/tree/memfix? It has fixed these issues for some of our usage, but I'm unsure if it's a complete fix. I'm also not entirely sure what the problem was to begin with and how or why this branch behaves differently.

liggitt · 2020-04-20T20:57:00Z

@gyuho, should #201 be reverted while this issue remains? if I'm reading this correctly, master and the latest release are still known bad against go 1.14.x (which #201 was fixing) and go1.13 ("At first we were running the tests with Go 1.14, then tried to go back to version 1.13, but the would still pop up.")

Roasbeef · 2020-04-21T00:02:37Z

if I'm reading this correctly, master and the latest release are still known bad against go 1.14.x (which #201 was fixing) and go1.13 ("At first we were running the tests with Go 1.14, then tried to go back to version 1.13, but the would still pop up.")

Yes, what's stable for us is: Go 1.13.x and bbolt v1.3.3 (so the prior tag). We're running @jrick's possible fix branch on our continuous integration (against Go 1.4.2) now to see if it resolves the issues we were running into at least. Will report back in a day or two.

gouthamve · 2020-04-27T13:27:43Z

@Roasbeef Sorry to ping you here. I was curious how the experiment went. Our upgrade to go1.14 is blocked on this and we'd like to help if we can.

jrick · 2020-04-27T15:11:00Z

@gouthamve you can try out my branch as well if you're interested in testing. I'm still looking for feedback on it before I open another pull request.

This command will apply the replacement for the test:

go mod edit -replace=go.etcd.io/bbolt=github.com/jrick/bbolt@memfix

Roasbeef · 2020-04-27T19:19:08Z

@jrick's memfix branch appears to have resolved the issues we were running into in our tests! I think a draft PR for this fix should be created now so those with knowledge of both the bbolt codebase, as well as the inner details of safe unsafe usage within the runtime can vet it to ensure it doesn't break anything else before we declare this our fix (looks good so far though).

Signed-off-by: Gyuho Lee <[email protected]>

gyuho · 2020-05-19T17:33:10Z

@Roasbeef could you share the tests? Is that something that can be added to bbolt as regression testing?

Roasbeef · 2020-05-22T23:15:48Z

@gyuho I think this is the test that was used to repro: https://github.com/matheusd/bbolt-sweep-bug/blob/master/my_test.go

jrick · 2020-05-23T16:59:57Z

@gyuho I've committed a modified version of that test to my PR.

arjunsingri · 2020-06-01T17:35:14Z

Is it okay if we use go 1.14.x and bbolt 1.3.3? Has anyone experimented with that? Please let me know.

andrewpmartinez · 2020-06-17T18:02:51Z

This is currently cropping up in one of my projects. I see that two days ago #220 was merged to correct this. I am not familiar with this project's timeline for patch releases: when can we expected this to be tagged for a version?

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

gyuho · 2020-06-17T19:24:00Z

Please try https://github.com/etcd-io/bbolt/releases/tag/v1.3.5

We had once updated bbolt from v1.3.3 to v1.3.4 in containerd#4134, but reverted to v1.3.3 in containerd#4156 due to "fatal error: sweep increased allocation count" (etcd-io/bbolt#214). The issue was fixed in bbolt v1.3.5 (etcd-io/bbolt#220). Signed-off-by: Akihiro Suda <[email protected]>

We had once updated bbolt from v1.3.3 to v1.3.4 in containerd#4134, but reverted to v1.3.3 in containerd#4156 due to "fatal error: sweep increased allocation count" (etcd-io/bbolt#214). The issue was fixed in bbolt v1.3.5 (etcd-io/bbolt#220). Signed-off-by: Akihiro Suda <[email protected]> (cherry picked from commit bebfbab) Signed-off-by: Akihiro Suda <[email protected]>

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

wpaulino mentioned this issue Apr 3, 2020

walletdb: revert bolt v1.3.4 btcsuite/btcwallet#690

Merged

Roasbeef mentioned this issue Apr 3, 2020

panic: runtime error: unsafe pointer conversion (Go 1.14) #187

Closed

mxpv mentioned this issue Apr 5, 2020

Ocasional containerd crashes on CI containerd/containerd#4154

Closed

mxpv mentioned this issue Apr 5, 2020

Revert "vendor: update go.etcd.io/bbolt v1.3.4" containerd/containerd#4156

Merged

This was referenced Apr 6, 2020

[release/1.3] Revert "vendor: update go.etcd.io/bbolt v1.3.4" containerd/containerd#4158

Merged

Revert "vendor: update go.etcd.io/bbolt v1.3.4" moby/moby#40777

Merged

Roasbeef mentioned this issue Apr 14, 2020

build: update travis to build against go 1.14 lightningnetwork/lnd#4033

Merged

liggitt mentioned this issue Apr 18, 2020

Update Golang to v1.14.4 kubernetes/kubernetes#88638

Merged

gouthamve mentioned this issue Apr 22, 2020

Update golang to 1.14.4 and other build deps cortexproject/cortex#2480

Merged

jrick mentioned this issue Apr 28, 2020

Fix incorrect unsafe usage #220

Merged

liggitt referenced this issue in etcd-io/etcd May 19, 2020

Makefile: bump up default Go version to 1.14.3

93de725

Signed-off-by: Gyuho Lee <[email protected]>

gyuho closed this as completed in #220 Jun 15, 2020

andrewpmartinez added a commit to openziti/foundation that referenced this issue Jun 17, 2020

uses unreleased bbolt 1.3.5

4d32fe8

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

andrewpmartinez mentioned this issue Jun 17, 2020

uses unreleased bbolt 1.3.5 openziti/foundation#93

Merged

AkihiroSuda mentioned this issue Jun 22, 2020

vendor: update bbolt to v1.3.5 containerd/containerd#4334

Merged

plorenz pushed a commit to openziti/transport that referenced this issue Mar 30, 2022

uses unreleased bbolt 1.3.5

d0f5b19

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

plorenz pushed a commit to openziti/storage that referenced this issue Mar 30, 2022

uses unreleased bbolt 1.3.5

55367c1

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

plorenz pushed a commit to openziti/identity that referenced this issue Jun 29, 2022

uses unreleased bbolt 1.3.5

37f6359

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

plorenz pushed a commit to openziti/agent that referenced this issue Jun 29, 2022

uses unreleased bbolt 1.3.5

4c8e275

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

plorenz pushed a commit to openziti/metrics that referenced this issue Jun 29, 2022

uses unreleased bbolt 1.3.5

09b2705

- need fix from etcd-io/bbolt#214 and etcd-io/bbolt#220 for full go 1.14 compat

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sweep increased allocation count with v1.3.4 #214

sweep increased allocation count with v1.3.4 #214

Roasbeef commented Apr 3, 2020 •

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jrick commented Apr 6, 2020

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Roasbeef commented May 22, 2020

jrick commented May 23, 2020

arjunsingri commented Jun 1, 2020

andrewpmartinez commented Jun 17, 2020

gyuho commented Jun 17, 2020

sweep increased allocation count with v1.3.4 #214

sweep increased allocation count with v1.3.4 #214

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