Troubleshooting & Support for MuleSoft Applications (Course #troubleshooting-support)

Programme every line is something you do

4 modules · 13 topics · in course-flow order

1. Module 1

   Logs as forensic evidence

   Objective. Correlate logs and stack traces across layers into a timeline that pins the failing hop.

   • Parse log4j2 layouts and Mule correlationIds to stitch events across System, Process and Experience layers
   • Decode stack traces in under 5 minutes: root-cause lines, connector classes, caused-by chains
   • Standardize logger output (correlationId, context vars) so any transaction is rebuildable from logs
2. Module 2

   Failure families, first aid

   Objective. Diagnose the recurring runtime failure families and capture each resolution as a runbook entry.

   • Triage connectivity faults — timeout vs refused vs TLS handshake — with curl, openssl and port checks
   • Explain DataWeave errors from type mismatches and null selectors, then patch without side effects
   • Clear deployment failures (artifact size, memory ceilings, missing properties) from Runtime Manager logs
3. Module 3

   Thread dumps and heap proof

   Objective. Capture and interpret thread dumps, heap dumps and dashboards to isolate hangs and memory pressure.

   • Trigger thread dumps on a hung worker and spot BLOCKED threads pinning connection pools
   • Analyze heap dumps for leak suspects (unclosed streams, growing caches) with Eclipse MAT
   • Forward logs centrally (retention target: 30 days) so cross-application searches survive restarts
4. Module 4

   Escalate with leverage

   Objective. Package complete incident evidence into escalation tickets that resolve in one vendor round-trip.

   • Assemble an escalation packet — correlationIds, thread dumps, manifest, repro steps — within 15 minutes
   • Grade severity against an impact matrix and open MuleSoft Support cases under the right entitlement
   • Replay failed messages from Anypoint MQ DLQs after the fix, verifying idempotency before bulk redelivery
   • Close every P1 with a blameless RCA within 48 hours; recycle recurring failure modes into automated tests and hardening backlog

References & Official Documentation every claim above has a source

Module 1

• Configuring LoggingMuleSoft Docs
• Configuring Mule Stack TracesMuleSoft Docs
• Correlation IDMuleSoft Docs

Module 2

• Mule ErrorsMuleSoft Docs
• Viewing Log Data for Deployed AppsMuleSoft Docs

Module 3

• Integrating with Your Logging System Using Log4jMuleSoft Docs
• Managing Mule Apps Deployed to Runtime Fabric Using RTFCTLMuleSoft Docs

Module 4

• Configuring and Using QueuesMuleSoft Docs

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