batchConn中出现空指针

[Zstro]

tikv client版本: v2.0.1

[ERROR] [client_batch.go:303] [ba
tchSendLoop] [r="\"invalid memory address or nil pointer dereference\""] [stack="github.com/tikv/client
-go/v2/internal/client.(*batchConn).batchSendLoop.func1\n\t/root/go/pkg/mod/github.com/tikv/client-go/v
[email protected]/internal/client/client_batch.go:305\nruntime.gopanic\n\t/usr/local/go/src/runtime/panic.go:103
8\nruntime.panicmem\n\t/usr/local/go/src/runtime/panic.go:221\nruntime.sigpanic\n\t/usr/local/go/src/ru
ntime/signal_unix.go:735\nsync.(*entry).tryExpungeLocked\n\t/usr/local/go/src/sync/map.go:377\nsync.(*M
ap).dirtyLocked\n\t/usr/local/go/src/sync/map.go:370\nsync.(*Map).Store\n\t/usr/local/go/src/sync/map.g
o:158\ngithub.com/tikv/client-go/v2/internal/client.(*batchConn).getClientAndSend.func1\n\t/root/go/pkg
/mod/github.com/tikv/client-go/[email protected]/internal/client/client_batch.go:375\ngithub.com/tikv/client-go
/v2/internal/client.(*batchCommandsBuilder).build\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]
.1/internal/client/client_batch.go:115\ngithub.com/tikv/client-go/v2/internal/client.(*batchConn).getCl
ientAndSend\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/internal/client/client_batch.go:374
\ngithub.com/tikv/client-go/v2/internal/client.(*batchConn).batchSendLoop\n\t/root/go/pkg/mod/github.co
m/tikv/client-go/[email protected]/internal/client/client_batch.go:344"] [stack="github.com/tikv/client-go/v2/i
nternal/client.(*batchConn).batchSendLoop.func1\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]
/internal/client/client_batch.go:303\nruntime.gopanic\n\t/usr/local/go/src/runtime/panic.go:1038\nrunti
me.panicmem\n\t/usr/local/go/src/runtime/panic.go:221\nruntime.sigpanic\n\t/usr/local/go/src/runtime/si
gnal_unix.go:735\nsync.(*entry).tryExpungeLocked\n\t/usr/local/go/src/sync/map.go:377\nsync.(*Map).dirt
yLocked\n\t/usr/local/go/src/sync/map.go:370\nsync.(*Map).Store\n\t/usr/local/go/src/sync/map.go:158\ng
ithub.com/tikv/client-go/v2/internal/client.(*batchConn).getClientAndSend.func1\n\t/root/go/pkg/mod/git
hub.com/tikv/client-go/[email protected]/internal/client/client_batch.go:375\ngithub.com/tikv/client-go/v2/inte
rnal/client.(*batchCommandsBuilder).build\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/inter
nal/client/client_batch.go:115\ngithub.com/tikv/client-go/v2/internal/client.(*batchConn).getClientAndS
end\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/internal/client/client_batch.go:374\ngithub
.com/tikv/client-go/v2/internal/client.(*batchConn).batchSendLoop\n\t/root/go/pkg/mod/github.com/tikv/c
lient-go/[email protected]/internal/client/client_batch.go:344"]

似乎是batchCommandsEntry有个空指针，有什么外部原因能造成这个问题么？

[sticnarf]

这看起来有点怪。nil pointer dereference 发生在 sync.Map 里。如果是 batchCommandsEntry 里的 nil pointer，panic 的位置应该更早一点而不是在 tryExpungeLocked 里。

我现在看不出来哪里出了问题。你能提供更多信息吗？比如你的 Golang 版本，或是能提供复现问题的方式？

---

It looks weird. The nil pointer dereference happens in sync.Map. If it's a nil pointer in batchCommandsEntry, the panic point should be earlier instead of inside tryExpungeLocked.

I cannot find out what's going wrong now. Could you please provide more information, like your golang version and how to reproduce the problem?

[Zstro]

这看起来有点怪。nil pointer dereference 发生在 sync.Map 里。如果是 batchCommandsEntry 里的 nil pointer，panic 的位置应该更早一点而不是在 tryExpungeLocked 里。

我现在看不出来哪里出了问题。你能提供更多信息吗？比如你的 Golang 版本，或是能提供复现问题的方式？

It looks weird. The nil pointer dereference happens in sync.Map. If it's a nil pointer in batchCommandsEntry, the panic point should be earlier instead of inside tryExpungeLocked.

I cannot find out what's going wrong now. Could you please provide more information, like your golang version and how to reproduce the problem?

go的版本是1.16
现在问题就是不知道怎么触发的这个情况
平时比较多的日志都是这种

[INFO] [region_request.go:785] ["mark store's regions need be r
efill"] [id=4] [addr=10.119.37.5:20160] [error="rpcClient is idle"] [errorVerbose="rpcClient is idle\ngithub.com/tikv/client-go/v2/i
nternal/client.(*RPCClient).getConnArray\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/internal/client/client.go:304\ngith
ub.com/tikv/client-go/v2/internal/client.(*RPCClient).SendRequest\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/internal/c
lient/client.go:381\ngithub.com/tikv/client-go/v2/internal/client.interceptedClient.SendRequest\n\t/root/go/pkg/mod/github.com/tikv/
client-go/[email protected]/internal/client/client_interceptor.go:42\ngithub.com/tikv/client-go/v2/internal/client.reqCollapse.SendRequest\n
\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/internal/client/client_collapse.go:74\ngithub.com/tikv/client-go/v2/internal/
locate.(*RegionRequestSender).sendReqToRegion\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/internal/locate/region_request
.go:1130\ngithub.com/tikv/client-go/v2/internal/locate.(*RegionRequestSender).SendReqCtx\n\t/root/go/pkg/mod/github.com/tikv/client-
go/[email protected]/internal/locate/region_request.go:982\ngithub.com/tikv/client-go/v2/txnkv/txnsnapshot.(*ClientHelper).SendReqCtx\n\t/ro
ot/go/pkg/mod/github.com/tikv/client-go/[email protected]/txnkv/txnsnapshot/client_helper.go:109\ngithub.com/tikv/client-go/v2/txnkv/txnsnap
shot.(*KVSnapshot).get\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/txnkv/txnsnapshot/snapshot.go:572\ngithub.com/tikv/cl
ient-go/v2/txnkv/txnsnapshot.(*KVSnapshot).Get\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/txnkv/txnsnapshot/snapshot.go
:490\ngithub.com/tikv/client-go/v2/internal/unionstore.(*KVUnionStore).Get\n\t/root/go/pkg/mod/github.com/tikv/client-go/[email protected]/i
nternal/unionstore/union_store.go:102\ngithub.com/tikv/client-go/v2/txnkv/transaction.(*KVTxn).Get\n\t/root/go/pkg/mod/github.com/ti
kv/client-go/[email protected]/txnkv/transaction/txn.go:162"]

但是这次不知道什么原因conn中似乎没有addr了，才有初始化时引出了空指针