HugeGraph 1.8.0 Release Notes

WIP: This doc is under construction, please wait for the final version (BETA)

Java Environment: 1.8.0 HugeGraph components (Server, PD, Store) require Java 17 for runtime and source builds (1.7.0 is the last release supporting Java 11).
Query & Script Engine: Graph traversal framework upgraded to Apache TinkerPop 3.8.1, script engine upgraded to Groovy 4.0.25.

Removed has(key, traversal) overload: In Groovy on HugeGraph 1.8, legacy syntax fails immediately with an Invalid data type of query value exception due to strong type checks (pure TinkerGraph returns empty results). Use has('age', gt(30)) for simple conditions, or filter(__.values('age').is(gt(30))) for child traversals.
Removed store() & scoped aggregate(): Use aggregate('x') for global eager collection; use local(__.aggregate('x')) for lazy or per-object collection.
Step none() renamed to discard(): Discarding incoming traversers must now use discard() (avoids collision with new collection predicate none(P)).
Strict by() behavior on missing properties: Vertices missing properties are dropped in order().by(); keys are omitted from maps in project().by(); paths are discarded in path().by(). Wrap with coalesce() to provide explicit defaults if preservation is needed.
choose() semantics alignment: Executes only the first matching branch when conditions overlap; passes elements through unchanged by default when no branch matches or values are absent.

For comprehensive query comparison examples and the full migration checklist, see the HugeGraph 1.8.0 Gremlin Migration & Compatibility Guide.

Serializer class names: Serializer packages in conf/gremlin-server.yaml moved from org.apache.tinkerpop.gremlin.driver.ser.* to org.apache.tinkerpop.gremlin.util.ser.*.
HugeGraph Client 1.5.0: Basic CRUD and schema operations are backward-compatible on Server 1.8.0; however, Gremlin queries fail due to missing GraphSpace aliases, and auth paths require upgrading the client or using HTTP endpoints.
GPL word analyzer no longer bundled: word-1.3.jar is no longer bundled by default due to license compliance. Graphs configured with search.text_analyzer=word remain supported once word-1.3.jar is placed in Server’s lib/ directory. Alternatively, switch to IK or SmartCN (note that switching analyzers requires rebuilding search indexes).

Support TinkerPop 3.8 steps including discard(), mergeV(), mergeE(), and date steps (datetime(), dateAdd(), dateDiff())
Adapt HugeSecurityManager and Groovy 4.0.25 on Java 17
Improve count query visibility inside uncommitted transactions

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