[ZEPPELIN-6400] Remove ZeppelinConfiguration dependency from zeppelin-interpreter module

[jongyoul]

Summary

• Move ZeppelinConfiguration from zeppelin-interpreter to zeppelin-zengine so it is no longer included in the shaded interpreter JAR. This prevents the Maven shade plugin from corrupting config string literals, which caused classpath-order-dependent configuration loading failures.
• Replace ZeppelinConfiguration usage in zeppelin-interpreter with Properties-based configuration across InterpreterLauncher, LifecycleManager, RecoveryStorage, DependencyResolver, and all launcher plugins (Docker, K8s, YARN, Flink).
• Update callers in zeppelin-zengine, zeppelin-server, flink, and markdown interpreter modules.
• Fix TimeoutLifecycleManager to parse time unit suffixes (e.g., "10s", "1000ms") by adding parseTimeValue(). Previously, Long.parseLong("10s") threw NumberFormatException, causing the TimeoutLifecycleManagerTest.testTimeout_2 to enter an infinite loop and hang CI for 6 hours.
• Fix flaky PersonalizeActionsIT.testGraphAction Selenium test by using clickAndWait() instead of clickableWait().click(), allowing the UI to update before assertion.

Motivation

ZeppelinConfiguration in zeppelin-interpreter gets processed by the Maven shade plugin, which corrupts string literals (e.g., org.apache.zeppelin → unshaded.org.apache.zeppelin). This causes config keys to mismatch at runtime depending on classpath ordering. Moving it to zeppelin-zengine (which is not shaded) permanently eliminates this class of bugs.

As discussed by the community: "ZeppelinConfiguration belongs to the Zeppelin server, and the Zeppelin interpreter should really only work on a HashMap with ConfigKey and ConfigValue."

Changes

Area	Change
zeppelin-interpreter (core)	Remove ZeppelinConfiguration imports; use Properties for config
InterpreterLauncher	ZeppelinConfiguration zConf → Properties zProperties
LifecycleManager / RecoveryStorage	Constructor takes Properties instead of ZeppelinConfiguration
TimeoutLifecycleManager	Add parseTimeValue() to handle time unit suffixes ("10s", "1000ms")
DependencyResolver	Accept individual config values instead of ZeppelinConfiguration
Launcher plugins (7 files)	Updated to Properties-based API
zeppelin-zengine	PluginManager passes derived values (absolute paths) via Properties
ZeppelinConfiguration.java	Moved from zeppelin-interpreter → zeppelin-zengine
PersonalizeActionsIT	Fix flaky testGraphAction by waiting for UI update after click

Future Work

Some logic was duplicated during this refactoring to keep zeppelin-interpreter independent of ZeppelinConfiguration:

• TimeoutLifecycleManager.parseTimeValue() duplicates ZeppelinConfiguration.timeUnitToMill() — both parse time strings like "10s" or "1000ms" via Duration.parse("PT" + value). A shared utility in zeppelin-common could consolidate this in the future.
• Config key strings (e.g., "zeppelin.interpreter.lifecyclemanager.timeout.threshold") are now hardcoded as plain strings in zeppelin-interpreter rather than referencing ConfVars enum constants. If config key management becomes an issue, a lightweight key constants class could be introduced.

Test Plan

• CI: core.yml - Core module tests (including TimeoutLifecycleManagerTest)
• CI: core.yml - Interpreter tests (Spark, Flink)
• CI: frontend.yml - E2E tests (Playwright + Selenium)
• CI: quick.yml - RAT license check
• Verify shaded JAR does not contain ZeppelinConfiguration

[Copilot]

Pull request overview

This PR removes ZeppelinConfiguration from the shaded zeppelin-interpreter module by migrating interpreter-side configuration to Properties, preventing shade-plugin string-literal corruption and classpath-order-dependent config failures.

Changes:

• Replaced ZeppelinConfiguration usage in interpreter runtime paths with Properties (lifecycle managers, remote server, dependency resolution, markdown, Flink).
• Updated DependencyResolver/Booter APIs to accept explicit proxy + Maven repo URL parameters instead of ZeppelinConfiguration.
• Adjusted server/zengine callers and tests to use the new constructors and properties-based configuration.

Reviewed changes

Copilot reviewed 30 out of 37 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/remote/RemoteInterpreterServer.java	Switches remote interpreter server config from ZeppelinConfiguration to Properties, including defaults for key runtime settings.
zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/lifecycle/TimeoutLifecycleManager.java	Introduces properties-based timeout settings and new time parsing logic for lifecycle timeouts.
zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerFactory.java	Replaces ZeppelinConfiguration static lookup with env/system-property based thread pool sizing.
zeppelin-interpreter/src/main/java/org/apache/zeppelin/dep/AbstractDependencyResolver.java	Refactors dependency resolution to take explicit proxy credentials and Maven repo URL.
markdown/src/main/java/org/apache/zeppelin/markdown/FlexmarkParser.java	Switches markdown HTML escaping config from ZeppelinConfiguration to a properties key.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.

[jongyoul]

@Reamer @tbonelee @ParkGyeongTae Could you please check and review it? 🙏

cc/ @seung-00