8000 *: spans that are never explicitly Finish()-ed · Issue #58721 · cockroachdb/cockroach · GitHub
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*: spans that are never explicitly Finish()-ed #58721
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*: spans that are never explicitly Finish()-ed#58721
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asubiotto
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A-kv-observabilityA-tracingRelating to tracing in CockroachDB.
@irfansharif

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@irfansharif
irfansharif
opened on Jan 11, 2021

Consider the following two examples (there may be others, will need to audit more thoroughly):

cockroach/pkg/sql/conn_executor_exec.go

Lines 633 to 639 in 91a0898

var stmtThresholdSpan *tracing.Span
alreadyRecording := ex.transitionCtx.sessionTracing.Enabled()
stmtTraceThreshold := traceStmtThreshold.Get(&ex.planner.execCfg.Settings.SV)
if !alreadyRecording && stmtTraceThreshold > 0 {
ctx, stmtThresholdSpan = createRootOrChildSpan(ctx, "trace-stmt-threshold", ex.transitionCtx.tracer)
stmtThresholdSpan.SetVerbose(true)
}

cockroach/pkg/sql/colflow/vectorized_flow.go

Line 949 in 91a0898

ctx, span := tracing.ChildSpanRemote(ctx, "")

The created spans are never explicitly Finish()-ed. This may pose to be a problem with always-on tracing (#55592), where un-Finish()-ed spans take up room in an in-memory registry of active spans (#58490). This is a tracking issue to refer to as we fix these.

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