[JackieTien97]

Description

Long JVM pauses can exceed Edge's default 20-second metadata lease and trigger DataNode cache fencing and recovery even though ConfigNode and DataNode share the same JVM. Set the Edge default metadata_lease_fence_ms to 315360000000 (ten 365-day years) to effectively disable lease expiry for the combined process.

The finite value leaves headroom for the ConfigNode's five-second margin and conversion to nanoseconds. It also extends the ConfigNode's cache-invalidation wait when a service is unreachable. The standard deployment default remains 20 seconds.

Validation

• mvn clean package -DskipTests -pl distribution -am — passed.
• mvn verify -Drat.skip=true -DskipUTs -Dit.test=IoTDBEdgeBasicIT -DfailIfNoTests=false -Dfailsafe.failIfNoSpecifiedTests=false -pl integration-test -am -P EdgeIT -P with-integration-tests — 7 tests passed, none failed or skipped; startup, Tree/Table reads and writes, concurrent queries, and shutdown verified using the generated Edge package.
• Checked the generated archives and SHA-512 checksums; the long lease is present only in the Edge configuration.
• Checked that adding the ConfigNode margin and converting the timeout to nanoseconds fit in a signed long.

The initial integration-test invocation was blocked by RAT scanning seven pre-existing, untracked local files. The successful run skipped RAT; those files are not included in this PR.

This PR has:

• been self-reviewed.
• added comments explaining the configuration's purpose and finite value.
• been tested with a local Edge instance.

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.53%. Comparing base (1512190) to head (8768a63).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #19165      +/-   ##
============================================
- Coverage     48.53%   48.53%   -0.01%     
  Complexity      635      635              
============================================
  Files          5573     5573              
  Lines        412215   412284      +69     
  Branches      54338    54350      +12     
============================================
+ Hits         200062   200084      +22     
- Misses       212153   212200      +47     

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