NDMP 操作失败，并出现错误：无法获取快照模式

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适用场景

ONTAP 8.3.2
NDMP （网络数据管理协议）

问题描述

NDMP 操作失败，并显示错误： Unable to get snapshot mode

在备份日志上：

dmp Sat Oct 23 12:48:28 CEST 202 NETWORK DUMP: (0) Start (Level 0, NDMP:25361)

dmp Sat Oct 23 12:48:28 CEST 202 NETWORK DUMP: (0) Options (b=64, TCP recv buffer size = 36592, TCP send buffer size = 36592)

dmp Sat Oct 23 12:48:28 CEST 202 NETWORK DUMP: (0) Tape_open (ndmp)

dmp Sat Oct 23 13:25:34 CEST 202 [uninitialized](1) Error (Unable to get snapshot mode.)

dmp Sat Oct 23 13:25:34 CEST 202 [uninitialized](1) Error (Dump failed to initialize.)

dmp Sat Oct 23 13:25:34 CEST 202 [uninitialized](1) Abort (0 MB)

在 NDMP 日志上：

Sat Oct 23 2021 12:47:07 +02:00 [kern_ndmpd:info:3524] [25363] DEBUG: NDMP persona set to vserver aware

Sat Oct 23 2021 12:48:28 +02:00 [kern_ndmpd:info:3524] [25363] INFO: DATA notification state 2 (SESS_STATE: CONNECTED) event 10 (EVENT: STATE CHANGE)

Sat Oct 23 2021 12:48:28 +02:00 [kern_ndmpd:info:3524] [25363] INFO: START BACKUP Doing a LEVEL 0 backup

Sat Oct 23 2021 12:48:28 +02:00 [kern_ndmpd:info:3524] [25363] INFO: DATA: start backup request: VFS='/vserver_name/volume_name/.snapshot/snapshot_name' LEVEL=0 UPDATE HISTORY

Sat Oct 23 2021 12:48:28 +02:00 [kern_ndmpd:info:3524] [25363] INFO: DATA notification state 1 (SESS_STATE: LISTENING) event 10 (EVENT: STATE CHANGE)

Sat Oct 23 2021 12:48:28 +02:00 [kern_ndmpd:info:3524] [25363] INFO: DATA notification state 4 (SESS_STATE: ACTIVE) event 10 (EVENT: STATE CHANGE)

Sat Oct 23 2021 13:25:34 +02:00 [kern_ndmpd:info:3524] [25363] INFO: DATA notification state 5 (SESS_STATE: HALTING) event 9 (EVENT: INTERNAL ERROR)

Sat Oct 23 2021 13:25:34 +02:00 [kern_ndmpd:info:3524] [25363] ERROR: DATA: Operation terminated: EVENT: INTERNAL ERROR (for /vserver_name/volume_name/.snapshot/snapshot_name)

Sat Oct 23 2021 13:25:34 +02:00 [kern_ndmpd:info:3524] [25363] INFO: DATA: received STOP command

同时，此故障也会通过 SnapMirror 传输新快照

SnapMirror 审核日志：

Sat Oct 23 13:25:37 CEST 2021 ScheduledUpdate[Oct 23 13:20:00]:action=End source=<source_vserver:source_volume> destination=<destination_vserver:destination_volume>

status=Success bytes_transferred=485179504 network_compression_ratio=1.0:1 transfer_desc=Logical Transfer with Storage Efficiency - Optimized Directory Mode