Java Good First Issues

Java

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Average annotated difficulty: 2.5/5 across 5,028 issues.
75% of 5,028 time estimates are one day or less.

Open

[Bug] Failed to initialize MCP client: business-knowledge-query

area/core/toolbughelp wanted

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

agentscope-ai / agentscope-java · #885 · Mar 6, 2026 · Java · 3,253 stars

0 comments0 reactions0 assignees

Open

[Bug] Regarding the system parameter $[yyyyMMdd-1], when the system timezone is set to US West (America/Los_Angeles), there is a Daylight Saving Time (DST) transition issue where a day only has 23 hours.

backendbughelp wanted

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

apache / dolphinscheduler · #18015 · Mar 4, 2026 · Java · 11,659 stars

8 comments0 reactions1 assignee

Open

ClassCastException when writing Delta Lake checkpoint for Decimal columns (JSON Numeric vs String)

delta-lakegood first issue

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

trinodb / trino · #28532 · Mar 4, 2026 · Java · 9,113 stars

2 comments0 reactions0 assignees

Open

Feature request: add include/exclude path filters to repository_ctx.extract and repository_ctx.download_and_extract

P2help wantedteam-ExternalDepsteam-Rules-APItype: feature request

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

bazelbuild / bazel · #28858 · Mar 2, 2026 · Java · 25,384 stars

7 comments1 reaction0 assignees

Open

Users not loading from ldap by default

area/admin/uihelp wantedkind/enhancementpriority/lowstatus/auto-bumpstatus/auto-expireteam/core-iam

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

keycloak / keycloak · #46751 · Mar 2, 2026 · Java · 34,398 stars

11 comments2 reactions0 assignees

Open

Action-token page does not render "Back to Application" link on first load — appears only after locale switch (26.5.4)

area/login/uihelp wantedkind/bugpriority/normalstatus/auto-bumpstatus/auto-expireteam/core-authnteam/core-clients

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

keycloak / keycloak · #46714 · Mar 2, 2026 · Java · 34,398 stars

3 comments3 reactions1 assignee

Open

Duplicate timestamp in the output of "bazel version"

P3help wantedteam-ExternalDepstype: bug

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

bazelbuild / bazel · #28847 · Mar 1, 2026 · Java · 25,384 stars

3 comments0 reactions1 assignee

Open

[Docs][Core] Add Javadoc to CheckpointCoordinator (checkpoint state machine)

help wanted

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

apache / seatunnel · #10545 · Feb 28, 2026 · Java · 6,897 stars

3 comments0 reactions0 assignees

Open

[Docs][Core] Add Javadoc to MultiTableWriterRunnable

help wanted

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

apache / seatunnel · #10538 · Feb 28, 2026 · Java · 6,897 stars

1 comment0 reactions0 assignees

Open

[Docs][Core] Add Javadoc to key lifecycle, checkpoint, and multi-table methods across seatunnel-api and seatunnel-engine

help wanted

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

apache / seatunnel · #10533 · Feb 28, 2026 · Java · 6,897 stars

2 comments1 reaction0 assignees

Open

[FEATURE] Add Firefox Beta & Nightly to Search Bar

feature-requestgood first issuestatus: reviewed

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

LawnchairLauncher / lawnchair · #6439 · Feb 28, 2026 · Java · 7,962 stars

2 comments3 reactions0 assignees

Open

/admin/realms/{realm}/users is slow for “view-only” callers due to per-user group traversal in access checks (N+1 USER_GROUP_MEMBERSHIP)

area/organizationshelp wantedkind/enhancementpriority/normalstatus/auto-bumpteam/core-iam

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

keycloak / keycloak · #46682 · Feb 27, 2026 · Java · 34,398 stars

4 comments2 reactions1 assignee

Open

Partial realm import with ifResourceExists=OVERWRITE delete service-account-* user of clients

area/import-exporthelp wantedkind/bugpriority/normalstatus/auto-bumpstatus/auto-expireteam/core-clientsteam/core-shared

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

keycloak / keycloak · #46674 · Feb 27, 2026 · Java · 34,398 stars

1 comment2 reactions0 assignees

Open

Add ZGC Option for MeowIce Flags

enhancementhelp wanted

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

itzg / docker-minecraft-server · #3954 · Feb 27, 2026 · Shell · 13,694 stars

5 comments0 reactions0 assignees

Open

Bazel hangs when `--execution_log_compact_file` and `--build_event_binary_file` both point to named pipes

P3help wantedteam-Local-Exectype: feature request

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

bazelbuild / bazel · #28800 · Feb 25, 2026 · Java · 25,384 stars

3 comments0 reactions0 assignees

Open

Integration test Kafka instrumentation against latest minor version

help wantedtype: task

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

micrometer-metrics / micrometer · #7233 · Feb 25, 2026 · Java · 4,882 stars

2 comments0 reactions0 assignees

Open

[Feature]: Support auto tool scan and registration from Spring Context.

area/ext/spring-bootenhancementhelp wanted

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

agentscope-ai / agentscope-java · #821 · Feb 25, 2026 · Java · 3,253 stars

1 comment0 reactions1 assignee

Open

Clustered LDAP: Component update triggers concurrent KEYCLOAK_GROUP inserts causing duplicate key violations

area/ldaphelp wantedkind/bugpriority/normalstatus/auto-bumpteam/core-iam

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

keycloak / keycloak · #46575 · Feb 24, 2026 · Java · 34,398 stars

4 comments5 reactions1 assignee

Open

Test SQL Server handling of decimal type with negative scale

good first issuesqlserver

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

trinodb / trino · #28418 · Feb 23, 2026 · Java · 9,113 stars

8 comments0 reactions0 assignees

Open

Test Ignite handling of decimal type with negative scale

good first issueignite

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

trinodb / trino · #28416 · Feb 23, 2026 · Java · 9,113 stars

2 comments0 reactions0 assignees

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