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Management Gateway Daemon (mgwd) Panics with SIGABRT

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ontap-9
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Core
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Applies to

  • AFF/ASA/FAS
  • ONTAP 9
  • Systems with automatic volume rebalancing enabled

Issue

  • Multiple nodes in the cluster experience repeated panics of the Management Gateway Daemon (mgwd), with log entries such as:
  • Sample EMS output:

Tue Sep 08 23:01:05 -0700 [Node-03: mgwd: ucore.error:error]: Could not dump core for process ID 40606 (mgwd). Reason: WRITE failed (error 4) after 5.493996 secs (321843200 of 512737280 bytes).
Tue Sep 08 23:01:05 -0700 [Node-03: mgwd: ucore.error:error]: Could not dump core for process ID 40606 (mgwd). Reason: coredump "/mroot/etc/.usercores/mgwd.40606.0538074189.1788933661.ucore" failed: error

  • MGWD is crashing by watchdog:

Tue Sep 08 18:09:40 -0700 [Node-03: mgwd: mhost.svc.watchdog:debug]: "RPC service thread held > 600 (sec) by application for function DSMDB_CREATE_IMP - collect_disk_stats"
Tue Sep 08 19:38:52 -0700 [Node-03: mgwd: mhost.svc.watchdog:debug]: "RPC service thread held > 600 (sec) by application for function DSMDB_CREATE_IMP - collect_disk_stats"
Tue Sep 08 20:17:55 -0700 [Node-03: mgwd: mhost.svc.watchdog:debug]: "RPC service thread held > 600 (sec) by application for function DSMDB_CREATE_IMP - queue_disk_stats_collector"

  • MGWD.GZ:

0000001b.255eee3b 0540e542 Tue Sep 08 2026 15:55:48 -07:00 [kern_mgwd:info:40606] 0x84f2c8800: 0: ERR: MGWD::NSLIBC: NSLIBC: _wrapped_yp_dobind(), ../../../../../../src/lib/libc/yp/yplib.c:956, Vsid = 9 Port Binding Failed: Invalid argument (errno = 22)
0000001b.255eee3c 0540e542 Tue Sep 08 2026 15:55:48 -07:00 [kern_mgwd:info:40606] 0x84e75d100: 0: ERR: MGWD::NSLIBC: NSLIBC: _wrapped_yp_dobind(), ../../../../../../src/lib/libc/yp/yplib.c:956, Vsid = 9 Port Binding Failed: Invalid argument (errno = 22)
0000001b.255eee3d 0540e542 Tue Sep 08 2026 15:55:48 -07:00 [kern_mgwd:info:40606] 0x84e75d100: 0: ERR: MGWD::NSLIBC: NSLIBC: wrapped_nis_netgroup_byhost(), ../../../../../../netapp/lib/libc/netgroups.c:1756, Vsid = 9 NIS error is NS_ERROR_NONE for netgroup pdx-admin, retval for key pdx1-sim-h44-020.* is 5
0000001b.255eee3e 0540e542 Tue Sep 08 2026 15:55:48 -07:00 [kern_mgwd:info:40606] 0x82280d600: 0: ERR: MGWD::NSLIBC: NSLIBC: _wrapped_yp_dobind(), ../../../../../../src/lib/libc/yp/yplib.c:956, Vsid = 9 Port Binding Failed: Invalid argument (errno = 22)
0000001b.255eee3f 0540e542 Tue Sep 08 2026 15:55:48 -07:00 [kern_mgwd:info:40606] 0x82280d600: 0: ERR: MGWD::NSLIBC: NSLIBC: wrapped_nis_netgroup_byhost(), ../../../../../../netapp/lib/libc/netgroups.c:1756, Vsid = 9 NIS error is NS_ERROR_NONE for netgroup pdx-admin, retval 

  • High management latency, repeated mgwd restarts, incomplete or failed core dumps, and degraded performance on vol0.

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