CAMEL-24128: camel-jpa - Fix EntityManager leak in JpaPollingConsumer

[davsclaus]

Summary

• Fix JpaPollingConsumer.receive() leaking an EntityManager on every successful call
• The root cause was passing null instead of the exchange to getTargetEntityManager(), which skipped registering JpaCloseEntityManagerOnCompletion on the exchange
• The fix moves exchange creation before the EM acquisition so the exchange is passed, enabling the automatic cleanup synchronization

Test plan

• All existing JpaPollingConsumer* tests pass (4 tests)

Claude Code on behalf of davsclaus

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com

[github-actions]

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[gnodet]

Clean fix for an EntityManager leak — every JpaPollingConsumer.receive() call leaked an unclosed EM.

Note: This PR is stacked on PR #24790 (CAMEL-24129, the createPreDeleteHandler → getPreDeleteHandler fix). My review focuses on the CAMEL-24128 commit.

The bug: receive() calls getTargetEntityManager(null, ...) — passing null for the exchange. Inside JpaHelper.createEntityManager(), the null exchange check at line 104 skips:

• Storing the EM for reuse (line 106-107)
• Registering JpaCloseEntityManagerOnCompletion (line 116) — the only cleanup path

So every successful receive() creates an EntityManager that is never closed.

The fix: Move Exchange exchange = getEndpoint().createExchange() before the getTargetEntityManager() call so the exchange is available to pass. Now createEntityManager() receives a non-null exchange, stores the EM, and registers the JpaCloseEntityManagerOnCompletion synchronization that closes it when the exchange completes.

The change is minimal — just reorder two statements and replace null with exchange. No new behavior, just enabling the existing cleanup mechanism.

Checklist:

• ✅ Minimal fix, enables the existing JpaCloseEntityManagerOnCompletion cleanup
• ✅ Consistent with how JpaConsumer.poll() already passes the exchange to getTargetEntityManager()
• ✅ Existing JpaPollingConsumer* tests pass (4 tests per PR description)
• ✅ CI pending (builds running)

Reviewed with Claude Code (claude-code/1.0) on behalf of gnodet. This review was generated by an AI agent and may contain inaccuracies; please verify all suggestions before applying.

[github-actions]

🧪 CI tested the following changed modules:

• components/camel-jpa

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🔬 Scalpel shadow comparison — Scalpel: 9 tested, 29 compile-only — current: 9 all tested

Maveniverse Scalpel detected 38 affected modules (current approach: 9).

⚠️ Modules only in Scalpel (29)

• apache-camel
• camel-allcomponents
• camel-catalog
• camel-catalog-console
• camel-catalog-lucene
• camel-catalog-maven
• camel-catalog-suggest
• camel-componentdsl
• camel-csimple-maven-plugin
• camel-endpointdsl
• camel-endpointdsl-support
• camel-itest
• camel-jbang-core
• camel-jbang-it
• camel-jbang-main
• camel-jbang-plugin-edit
• camel-jbang-plugin-generate
• camel-jbang-plugin-kubernetes
• camel-jbang-plugin-test
• camel-kamelet-main
• camel-launcher
• camel-report-maven-plugin
• camel-route-parser
• camel-yaml-dsl
• camel-yaml-dsl-deserializers
• camel-yaml-dsl-maven-plugin
• coverage
• docs
• dummy-component

Skip-tests mode would test 9 modules (1 direct + 8 downstream), skip tests for 29 (generated code, meta-modules)

Modules Scalpel would test (9)

• camel-jbang-mcp
• camel-jbang-plugin-mcp
• camel-jbang-plugin-route-parser
• camel-jbang-plugin-tui
• camel-jbang-plugin-validate
• camel-jpa
• camel-launcher-container
• camel-yaml-dsl-validator
• camel-yaml-dsl-validator-maven-plugin

Modules with tests skipped (29)

• apache-camel
• camel-allcomponents
• camel-catalog
• camel-catalog-console
• camel-catalog-lucene
• camel-catalog-maven
• camel-catalog-suggest
• camel-componentdsl
• camel-csimple-maven-plugin
• camel-endpointdsl
• camel-endpointdsl-support
• camel-itest
• camel-jbang-core
• camel-jbang-it
• camel-jbang-main
• camel-jbang-plugin-edit
• camel-jbang-plugin-generate
• camel-jbang-plugin-kubernetes
• camel-jbang-plugin-test
• camel-kamelet-main
• camel-launcher
• camel-report-maven-plugin
• camel-route-parser
• camel-yaml-dsl
• camel-yaml-dsl-deserializers
• camel-yaml-dsl-maven-plugin
• coverage
• docs
• dummy-component

ℹ️ Shadow mode — Scalpel observes but does not affect test execution. Learn more

All tested modules (38 modules)

• Camel :: All Components Sync point
• Camel :: Assembly
• Camel :: Catalog :: CSimple Maven Plugin (deprecated)
• Camel :: Catalog :: Camel Catalog
• Camel :: Catalog :: Camel Report Maven Plugin
• Camel :: Catalog :: Camel Route Parser
• Camel :: Catalog :: Console
• Camel :: Catalog :: Dummy Component
• Camel :: Catalog :: Lucene (deprecated)
• Camel :: Catalog :: Maven
• Camel :: Catalog :: Suggest
• Camel :: Component DSL
• Camel :: Coverage
• Camel :: Docs
• Camel :: Endpoint DSL
• Camel :: Endpoint DSL :: Support
• Camel :: Integration Tests
• Camel :: JBang :: Core
• Camel :: JBang :: Integration tests
• Camel :: JBang :: MCP
• Camel :: JBang :: Main
• Camel :: JBang :: Plugin :: Edit
• Camel :: JBang :: Plugin :: Generate
• Camel :: JBang :: Plugin :: Kubernetes
• Camel :: JBang :: Plugin :: MCP
• Camel :: JBang :: Plugin :: Route Parser
• Camel :: JBang :: Plugin :: TUI
• Camel :: JBang :: Plugin :: Testing
• Camel :: JBang :: Plugin :: Validate
• Camel :: JPA
• Camel :: Kamelet Main
• Camel :: Launcher
• Camel :: Launcher :: Container
• Camel :: YAML DSL
• Camel :: YAML DSL :: Deserializers
• Camel :: YAML DSL :: Maven Plugins
• Camel :: YAML DSL :: Validator
• Camel :: YAML DSL :: Validator Maven Plugin

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