Large number of logging events are generated in the vsanmgmt.log from vsand process when events include structured data.

Products

• VMware vSAN
• VMware vSAN 7.x
• VMware vSAN 8.x

Issue/Introduction

Symptoms:

Large number of logging events are generated in the vsanmgmt.log from vsand process when events include structured data.  

For example, a single "message" generates 15 log entries with payload data chunked across them.  This generates a large amount of events that required extra processing by remote log hosts like Log Insight.  Because the events are stored separately, the payload data loses it's context.


vsanmgmt.log:2025-04-08T23:16:26.095Z In(14) vsand[2101688]: [opID=#######-#### VsanPerformanceManagerImpl::executeQueryNodeInfo] QueryNodeInformation result: (vim.cluster.VsanPerfNodeInformation) {
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   version = '8.0.203',
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   isCmmdsMaster = true,
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   isStatsMaster = true,
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   vsanMasterUuid = '64cc12c9-b8a4-a747-####-############',
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   vsanNodeUuid = '64cc12c9-b8a4-a747-####-############',
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   masterInfo = (vim.cluster.VsanPerfMasterInformation) {
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:     secSinceLastStatsWrite = 167,
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:     secSinceLastStatsCollect = 168,
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:     statsIntervalSec = 300,
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:     statsDirectoryPercentFree = 97,
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:     verboseMode = false
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   },
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]:   diagnosticMode = false
vsanmgmt.log:2025-04-08T23:16:26.095Z In(14)[+] vsand[2101688]: }

Environment

VMware vSAN 7.x
VMware vSAN 8.x

Cause

Broadcom Engineering identified the logs formatting issue and they are actively working on a fix.

Resolution

There is currently no resolution for this issue. Broadcom Engineering is working on a fix.
Update ESXi Hosts to the new version with the fix included once released.