Skip to main content
NetApp Knowledge Base

Search

  • Filter results by:
    • View attachments
    Searching in
    About 7 results
    • ONTAP system panic due to slow root volume
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/ONTAP_system_panic_due_to_slow_root_volume
      Advanced command cluster ring show may show a timeout/failure to communicate with a node: Warning: Unable to list entries on node cluster-01. Timeout: Operation "cluster_ring_iterator::next_imp()" too...Advanced command cluster ring show may show a timeout/failure to communicate with a node: Warning: Unable to list entries on node cluster-01. Timeout: Operation "cluster_ring_iterator::next_imp()" took longer than 25 seconds to complete [from mgwd on node "cluster-01" (VSID: -1) to mgwd at 169.254.1.123] Error: show failed: Timeout: Operation "cluster_ring_iterator::next_imp()" took longer than 25 seconds to complete [from mgwd on node "cluster-01" (VSID: -1) to mgwd at 169.254.1.123]
    • Service outage with Nblade.vldb.Timeout
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Service_outage_with_Nblade.vldb.Timeout
      The service failed, but was unsuccessfully restarted. clustermgt_01 ERROR Nblade.vldb.Timeout: Request from the network module to the volume location database (VLDB) timed out. clustermgt_01 ALERT nod...The service failed, but was unsuccessfully restarted. clustermgt_01 ERROR Nblade.vldb.Timeout: Request from the network module to the volume location database (VLDB) timed out. clustermgt_01 ALERT nodewatchdog.svc.rpc.noresp: The mgwd service internal to Data ONTAP that is required for continuing data service was unavailable. The service failed, but was restarted.
    • The /etc/crash/ directory reaches the maxdirsize limit
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/The_etc_crash_directory_reaches_the_maxdirsize_limit
      The following errors are seen in EMS: Thu Aug 23 13:59:27 CST [filera:wafl.dir.size.max:warning]: Directory /vol/vol0/etc/crash/ reached the maxdirsize limit. Reduce the number of files or use the vol...The following errors are seen in EMS: Thu Aug 23 13:59:27 CST [filera:wafl.dir.size.max:warning]: Directory /vol/vol0/etc/crash/ reached the maxdirsize limit. Reduce the number of files or use the vol options command to increase this limit. On checking /etc/crash in the diag Mode, it is confirmed that there are over 100K ucore files in the folder: A spare disk can be seen with 'Awating savecore' status if the controller panics in this state.
    • How to generate a ucore file from an ONTAP system
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/How_to_generate_a_ucore_file_from_an_ONTAP_system
      Applies to ONTAP 9 ucore memory dump file Description This procedure explains how to generate a ucore memory dump file for a process/application within ONTAP. Note: See the following article for getti...Applies to ONTAP 9 ucore memory dump file Description This procedure explains how to generate a ucore memory dump file for a process/application within ONTAP. Note: See the following article for getting a ucore from Mgwd: How to restart the mgwd process
    • ucore.panicString for cshmd assertion during cluster switch hardware upgrade
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Panic_Message__cshmd__assertion_0_at_src_tables_switch_info_resource_cc_795_failed
      Applies to ONTAP 9 BES-53248 Issue Cluster Network Switch migration to BES-53248 triggers a PANIC: ALERT spm.cshmd.process.exit: Cluster Switch Health Monitor process (cshmd) with ID 86409 exited as a...Applies to ONTAP 9 BES-53248 Issue Cluster Network Switch migration to BES-53248 triggers a PANIC: ALERT spm.cshmd.process.exit: Cluster Switch Health Monitor process (cshmd) with ID 86409 exited as a result of signal 6. This server will attempt to restart. ERROR ucore.panicString: 'cshmd: assertion (0) at src/tables/switch_info_resource.cc:795 failed, raising SIGABRT(6) at RIP 0x807967d9a (pid 86409, uid 0, timestamp 1629205900)'
    • kern.vm.mmap.return message is repeated followed by a MGWD subsystem restart
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/kern.vm.mmap.return_message_is_repeated_followed_by_a_MGWD_subsystem_restart
      Thu May 01 2025 08:46:45 GMT [node-01: mgwd: kern.vm.mmap.return: NOTICE] mmap(2) by mgwd (pid 3160) for size 6656000 failed: VMEM limit exceeded, limit 4294967296, error 12. Thu May 01 2025 08:50:01 ...Thu May 01 2025 08:46:45 GMT [node-01: mgwd: kern.vm.mmap.return: NOTICE] mmap(2) by mgwd (pid 3160) for size 6656000 failed: VMEM limit exceeded, limit 4294967296, error 12. Thu May 01 2025 08:50:01 GMT [node-01: mgwd: kern.vm.mmap.return: NOTICE] mmap(2) by mgwd (pid 3160) for size 6656000 failed: VMEM limit exceeded, limit 4294967296, error 12.
    • MGWD gateway restarts when System Manager New Experience is accessed
      https://kb.netapp.com/on-prem/ontap/DM/System_Manager/SM-KBs/MGWD_gateway_restarts_when_System_Manager_New_Experience_is_accessed
      Applies to ONTAP 9.7P17 OnCommand System Manager (OCSM) New Experience Issue Accessing System Managers dashboard causes MGWD to crash due to corrupt/ invalid contents in the network port table. This r...Applies to ONTAP 9.7P17 OnCommand System Manager (OCSM) New Experience Issue Accessing System Managers dashboard causes MGWD to crash due to corrupt/ invalid contents in the network port table. This results in port information missing from the System Manager dashboard.