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DVR Controllers Reach 95% Memory Utilization and Reboot Following 60% fbufs In Use and Flood Of DB Sync Messages

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TitleDVR Controllers Reach 95% Memory Utilization and Reboot Following 60% fbufs In Use and Flood Of DB Sync Messages
Symptoms
  • Pair of VSP 8404C switches configured as DVR controllers reboot/core after reaching 95% memory utilization following migration of layer 3 traffic into DVR domain
  • Log events seen leading to reboot/core
1 2019-06-11T10:16:16.467-07:00 DVRB_VSP8404_RowE CP1 - 0x0002474c - 00000000 GlobalRouter CPU INFO CPP DEBUG: 60 percent of fbufs are in use: 0 in Tx queue,
 1 2019-06-11T10:59:00.584-07:00 DVRB_VSP8404_RowE CP1 - 0x0027041a - 00900001.1 DYNAMIC SET GlobalRouter SW WARNING Memory reached 89% utilization, module will reboot when 95% utilization is reached
 1 2019-06-11T10:59:25.679-07:00 DVRB_VSP8404_RowE CP1 - 0x00390605 - 00000000 GlobalRouter DBSYNC ERROR Message from tMain to DB Sync not queued, error: 4. Restart PIM-GW and/or DVR subsystem on this node!
 1 2019-06-11T10:59:25.679-07:00 DVRB_VSP8404_RowE CP1 - 0x00390600 - 00000000 GlobalRouter DBSYNC ERROR DB Sync software error DBSyncRxPktAPI 287
  • Backtrace from core file
Lifecycle Crash Reporter: Process Name: cbcp-main.x, Thread Name: main, Signal 6, Slot: 1, PID 1854, LWP: 1854
[bt] Execution path:
[bt] /opt/appfs/lib/cp/libndlcs.so.1(_Z30nd_lcs_crash_exception_handleriP9siginfo_tPv+0x150)[0x9d472b8]
[bt] linux-vdso32.so.1(__kernel_sigtramp_rt32+0x0)[0x1003f0]
[bt] /lib/libpthread.so.0(__nanosleep+0x48)[0x9185824]
[bt] /opt/appfs/lib/cp/libv2l.so.1(+0x27ccc)[0x9a84ccc]
[bt] /opt/appfs/lib/cp/libndutl.so.1(nd_utl_nssleep+0x64)[0xfc892e4]
[bt] /opt/appfs/lib/cp/libndutl.so.1(nd_utl_sleep+0x3c)[0xfc893d8]
[bt] cbcp-main.x(user_syskill+0x20)[0x114d0630]
[bt] cbcp-main.x(main+0xc0)[0x1028a4a8]
[bt] /lib/libc.so.6(+0x217cc)[0x8c447cc]
[bt] /lib/libc.so.6(__libc_start_main+0xcc)[0x8c44988]
Environment
  • VSP 8404
  • VOSS 8.0.1.0 
Cause
Software defect VOSS-14267
Resolution
Upgrade to VOSS 8.0.6 release
Additional notes

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