Fix Jaeger dependency import and add Service Performance Monitoring - #132
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Included review availability: 3 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughThe Jaeger plugin adds dependency storage configuration, service performance data streams, trace filters, RED Metrics dashboards, dependency visualization, updated metadata, and documentation. ChangesJaeger observability
Sequence Diagram(s)sequenceDiagram
participant Dashboard
participant serviceCallRate
participant serviceErrorRate
participant serviceLatency
participant JaegerMetricsAPI
Dashboard->>serviceCallRate: Request call-rate data
Dashboard->>serviceErrorRate: Request error-rate data
Dashboard->>serviceLatency: Request latency data
serviceCallRate->>JaegerMetricsAPI: Query /api/metrics/calls
serviceErrorRate->>JaegerMetricsAPI: Query /api/metrics/errors
serviceLatency->>JaegerMetricsAPI: Query /api/metrics/latencies
JaegerMetricsAPI-->>serviceCallRate: Return metric families
JaegerMetricsAPI-->>serviceErrorRate: Return metric families
JaegerMetricsAPI-->>serviceLatency: Return metric families
serviceCallRate-->>Dashboard: Return finite service rows
serviceErrorRate-->>Dashboard: Return finite service rows
serviceLatency-->>Dashboard: Return finite service rows
Priority: ➖ Normal Merge Risk: ⚪ Minimal · up to The Jaeger observability expansion is mergeable; the reviewed dependency, tracing, and RED metrics paths have no established release-blocking risk. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@plugins/Jaeger/v1/docs/README.md`:
- Line 35: Update the SPM documentation near the Call Rate, Error Rate, and
Latency description to state both supported configurations: a PromQL-compatible
metrics backend populated by the OpenTelemetry Collector spanmetrics connector,
and direct metric computation from Elasticsearch or OpenSearch. Avoid presenting
the Prometheus-backed setup as a universal requirement, while preserving the
note about behavior when SPM is unavailable.
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plugins/Jaeger/v1/correlationRules/jaeger-bridge-service-to-service.jsonplugins/Jaeger/v1/cspell.jsonplugins/Jaeger/v1/dataStreams/dependencies.jsonplugins/Jaeger/v1/dataStreams/scripts/serviceCallRate.jsplugins/Jaeger/v1/dataStreams/scripts/serviceErrorRate.jsplugins/Jaeger/v1/dataStreams/scripts/serviceLatency.jsplugins/Jaeger/v1/dataStreams/serviceCallRate.jsonplugins/Jaeger/v1/dataStreams/serviceDependencies.jsonplugins/Jaeger/v1/dataStreams/serviceErrorRate.jsonplugins/Jaeger/v1/dataStreams/serviceLatency.jsonplugins/Jaeger/v1/dataStreams/traces.jsonplugins/Jaeger/v1/defaultContent/manifest.jsonplugins/Jaeger/v1/defaultContent/redMetrics.dash.jsonplugins/Jaeger/v1/defaultContent/tracing.dash.jsonplugins/Jaeger/v1/docs/README.mdplugins/Jaeger/v1/indexDefinitions/default.jsonplugins/Jaeger/v1/metadata.jsonplugins/Jaeger/v1/ui.json
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🧩 Plugin PR Summary📦 Modified Plugins
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clarkd
approved these changes
Sep 17, 2026
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📋 Summary
This PR fixes a bug where the Jaeger plugin imported no service dependencies at all on the most common storage backends, and adds Service Performance Monitoring coverage.
Dependencies came back empty
On Elasticsearch, OpenSearch and Cassandra the dependency graph is written by the
spark-dependenciesjob, which stamps every batch it writes with midnight UTC rather than the time it ran. The import asked Jaeger for a trailing one hour window, so for 23 hours out of every 24 it matched nothing and imported zero Dependency objects, even though the Jaeger UI's System Architecture tab showed a full graph.There is now a Dependency storage setting on the data source. Pre-aggregated backends (the default) get a 48 hour window, which always spans at least one written batch. Badger and in-memory deployments, which derive the graph from spans in the requested window, keep the one hour window.
I measured this against a live Elasticsearch-backed Jaeger at 08:28 UTC: a 1 hour lookback returned 0 rows, 12 hours returned 20, and 48 hours returned 21.
Dependencies no longer takes a dashboard timeframe, since the window is now driven by that setting. I've also added a per-service Service Dependencies stream, and a correlation rule that bridges the two Services either side of a Dependency so the call graph is traversable service to service.
Trace search ignored its result limit
The Traces stream sent Jaeger a
query.search_depthparameter, which does not exist in the v3 API, so the Number of Traces field did nothing. It now sendsquery.num_traces(verified that 1, 5 and 20 return exactly that many traces), and gains optional Operation and Minimum duration filters.Service Performance Monitoring
Three new streams read Jaeger's SPM endpoints: Service Call Rate, Service Error Rate and Service Latency. SPM needs a metrics backend configured in Jaeger, which most deployments don't have, so all three surface the error Jaeger itself reports ("trace metrics are currently disabled, no metrics backend configured") rather than rendering an empty tile. The other streams are unaffected either way.
The per-service perspective is now split in two so that a deployment without SPM doesn't open onto a screen of errored tiles. Tracing (operations, spans, call paths) works against any Jaeger. RED Metrics carries the three new streams, charting latency at the 50th, 95th and 99th percentiles, since a single quantile can't distinguish a slower median from a heavier tail.
Screenshots
Tracing
RED Metrics
🧩 Plugin details
🧪 Testing
Tested against a live Jaeger 2.20.0 backed by Elasticsearch, running in GKE and reached through an on-prem relay agent, with a real service estate emitting continuous traffic.
Dependencies: confirmed the import now brings back all 21 service pairs where it previously imported none, and that the lookback sweep above behaves as described across the midnight UTC boundary. Service Dependencies correctly narrows those 21 rows to the 9 involving a given service, in both directions.
Correlation: confirmed the bridge rule produces
depends onedges between Services, pointing from caller to callee (an earlier revision had these inverted, which showed up asorders-service depends on gatewayfor agateway -> orders-servicecall).Traces: confirmed the result limit is honoured exactly, and that the operation filter selects traces rather than spans (so the rows include other spans from a matching trace, which the field's help text now says).
SPM: enabled a metrics backend on the test deployment and confirmed all three streams return series, with Prometheus holding the expected
traces_span_metrics_*metrics. Before enabling it, confirmed the three streams surface Jaeger's own error message on the tile.Does this PR introduce any breaking changes?
Worth flagging even though it isn't breaking: the Dependencies stream no longer offers a timeframe selector, and a hidden
sourcecolumn was dropped from it. Existing Dependencies tiles keep working and will start returning rows they previously didn't.📚 Documentation
✅ Checklist
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Summary by CodeRabbit
New Features
Improvements