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Switch reloaded due to DCMD process termination on REST request

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TitleSwitch reloaded due to DCMD process termination on REST request
Symptoms
  • Switch reloaded due to DCMD process termination on REST request
    sw0# \[[5~[5~2018/11/26-09:10:15, [RAS-1001], 1168, SW/0 | Active, INFO, VDX6740, First failure data capture (FFDC) event occurred.
    2018/11/26-09:10:15, [HASM-1101], 1169, SW/1 | Standby, WARNING, VDX6740, HA State out of sync.
    Core dumped to /core_files/dcmd/core.3022 at Mon Nov 26 09:10:21 2018
     
    2018/11/26-09:10:15, [HASM-1000], 1170, SW/0 | Active, CRITICAL, VDX6740, Daemon dcm terminated. System initiated reload/failover for recovery.
    2018/11/26-09:10:24, [HSL-1013], 1171, SW/0 | Active, INFO, sw0,  Interface eth0 is link down 
    ####CBR cbr_dma_fo_halt():2475
    ####CBR cbr_dma_fo_halt():2486 crc_cntl = DMA_CH_HALT
    Restarting system.
  • Process terminates shortly after  "get-vnetwork-dvs" operational REST query
    -bash-4.2$ curl -u admin:password -kX POST http://10.152.3.119/rest/operational-state/get-vnetwork-dvs  -H 'Cache-Control: no-cache'   -H 'Content-Type: text/xml'   -H 'resource-depth: 100'
Environment
  • Network OS
  • VDX Series
  • vCenter
  • REST API
  • Defect NOS-54706
Cause
DCMd process crashed because there is no data or parameter in the REST query. This is normally specified with the "-d" flag.
Since there is no data field, the CLI handler receives number of parameters as zero which is a NULL value for vCenter  and results in the DCMd process termination.
Resolution
  • FIX
    • Upgrade to NOS 7.4.0 or any software release with a fix for defect NOS-54706
Additional notes
  • Sample query with data field:
    -bash-4.2$ curl -u admin:password -kX POST http://10.152.3.119/rest/operational-state/get-vnetwork-dvs  -H 'Cache-Control: no-cache'   -H 'Content-Type: text/xml'   -H 'resource-depth: 100' -d '<get-vnetwork-dvs><vcenter>vcenter5.0</vcenter></get-vnetwork-dvs>'

     

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