EMS "nblade.nfsConnResetAndClose with Reason OncRpcTcpInvalidRecordMarker" 的原因

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适用场景

ONTAP 9
NFS

问题解答

EMS.log 记录类型错误 Nblade.invTcpRecordMarker
可能会伴随类型错误 Nblade.nfsConnResetAndClose 和原因 Nblade.InvTcpRecordMarker

示例：
Nblade.invTcpRecordMarker: Invalid TCP record marker received from remote IP address x.x.x.x on local port xxxx. Vserver ID associated with this operation is x. Invalid reason is TCP_FRAGMENT, invalid record marker is xxxxxxxxx.

Nblade.nfsConnResetAndClose: Shutting down connection with the client. Vserver ID is x; network data protocol is NFS; client IP address:port is x.x.x.x:xxx. local IP address is x.x.x.x; reason is OncRpcTcpInvalidRecordMarker.

如果由于 Open Network Computation/Remote 操作步骤 Call 请求中的 TCP 记录标记无效而重置 TCP 连接，则会显示此错误消息。
每个 NFS 调用的头端都是 RPC 调用，如果此 RPC 调用的位数不正确或 ONTAP 不希望从客户端调用，则 ONTAP 将重置客户端 TCP 连接。
因此、 Nblade.nfsConnResetAndClose 可能会出现第二个错误。
此错误消息将指定哪个客户端为存储器提供了不正确的 RPC 标头，所使用的本地 TCP 端口， Vserver 以及记录标记。

以下是 ONC RPC 标头的无效 TCP 记录标记的不同子类型。

注意：对于以下所有 3 种情况， 请与客户端供应商一起调查 客户端发送无效记录标记的原因。

tcp_fragment：客户端发送的 RPC TCP 片段当前不受支持。

示例：
Nblade.invTcpRecordMarker:error]: Invalid TCP record marker received from remote IP address x.x.x.x on local port xxxx. Vserver ID associated with this operation is x. Invalid reason is TCP_FRAGMENT, invalid record marker is 4.

2.tcp_data_llength _overflow：收到的记录标记大于支持的最大大小（ 70KB 8.2 之前的大小）。300 KB 8.2 及更高， 9.0 及更高版本中为 1 MB ）

3.tcp_data_llef_undleflow：收到的记录标记小于支持的最小大小（记录标记必须大于或等于 40 字节）

示例：
Nblade.invTcpRecordMarker:error]: Invalid TCP record marker received from remote IP address x.x.x.x on local port xxxx. Invalid reason is TCP_DATA_LENGTH_UNDERFLOW, invalid record marker is 24.

追加信息

出现此消息的一个可能原因是、客户端会运行 telnet xxx.xxx.xxx.xxx 2049 以确认NFS的可访问性。

Linux client : [root@RHELClient8 ~]# telnet 10.xx.yy.211 2049 Trying 10.xx.yy.211... Connected to 10.xx.yy.211. Escape character is '^]'. ^] telnet> ^C Connection closed by foreign host.

[root@RHELClient8 ~]# ifconfig -a ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.zz.xx.79 netmask 255.255.255.0 broadcast 10.zz.xx.255

cdot_vsim8::> date ; event log show -event *Nblade*

Time Node Severity Event ------------------- ---------------- ------------- --------------------------- 4/14/2021 16:55:48 node1 ERROR Nblade.nfsConnResetAndClose: Shutting down connection with the client. Vserver ID is 2; network data protocol is NFS, Rpc Xid 0x0; client IP address:port is 10.zz.xx.79:33504. local IP address is 10.xx.yy.211; reason is OncRpcTcpInvalidRecordMarker. 4/14/2021 16:55:48 node1 ERROR Nblade.invTcpRecordMarker: Invalid TCP record marker received from remote IP address 10.zz.xx.79 on local port 2049. Vserver ID associated with this operation is 2. Invalid reason is TCP_FRAGMENT, invalid record marker is 218824696.