Java Good First Issues

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Open

[Feature Request] Provide official Debian (.deb) and RPM packages for standard installation

good first issuetype/feature-requestversion:4.2

StarRocks/starrocks #68,205 opened Jan 21, 2026 · Java · 5,717 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

5 comments0 reactions2 assignees

Open

Replace Guava Throwables.getRootCause() with helper

Guavagood first issue

bitcoinj/bitcoinj #4,033 opened Jan 20, 2026 · Java · 4,687 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

keycloak_user_events_total metric contains empty labels

area/observabilityhelp wantedkind/bugpriority/normalstatus/auto-bumpstatus/reopenedteam/cloud-nativeteam/production-readiness

keycloak/keycloak #45,582 opened Jan 19, 2026 · Java · 34,398 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

1 comment2 reactions2 assignees

Open

Provide a thread pool that limits virtual threads creation

EnhancementHelp Wanted

jetty/jetty.project #14,362 opened Jan 19, 2026 · Java · 3,701 stars

Why recommendedNo assignee yet · No comments yet

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

0 comments0 reactions0 assignees

Open

invite-existing-user API should reject invitations for users already in the organization

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

keycloak/keycloak #45,553 opened Jan 19, 2026 · Java · 34,398 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment3 reactions0 assignees

Open

Android TV stuck on v3.10

Area-PlayStoreEnvironment-AndroidTVIssue-Severe (high)help wanted

TeamAmaze/AmazeFileManager #4,556 opened Jan 18, 2026 · Java · 4,883 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment1 reaction0 assignees

Open

[Feature][Connector] Add Informix CDC Connector

help wanted

apache/seatunnel #10,359 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

3 comments0 reactions0 assignees

Open

[Feature][Connector] Add HubSpot Source Connector

good first issuehelp wanted

apache/seatunnel #10,358 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedHas a beginner-friendly label

Has a beginner-friendly label

3 comments0 reactions1 assignee

Open

[Feature][Connector] Add Azure CosmosDB Source Connector

good first issuehelp wanted

apache/seatunnel #10,357 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

2 comments0 reactions0 assignees

Open

Differences between monitoring ThreadPoolExecutor and ForkJoinPool

enhancementhelp wanted

micrometer-metrics/micrometer #7,089 opened Jan 16, 2026 · Java · 4,220 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

5 comments0 reactions0 assignees

Open

Help needed in getting bazel build command working on Windows from a mapped network drive

P3area-Windowsawaiting-user-responsehelp wantedteam-OSS

bazelbuild/bazel #28,321 opened Jan 16, 2026 · Java · 25,384 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

20 comments0 reactions0 assignees

Open

[Question] [Alert-http] Alert test sending failed, [Call method to Host(ip=dolphinscheduler-alert-67b7c695cb-v9b82, port=50052) failed]

help wantedimprovementkubernetes

apache/dolphinscheduler #17,883 opened Jan 16, 2026 · Java · 11,659 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

16 comments0 reactions0 assignees

Open

[Improve][Core] Support for Apache Flink 2.x

help wanted

apache/seatunnel #10,353 opened Jan 16, 2026 · Java · 6,897 stars

Why recommendedHas a beginner-friendly label

Has a beginner-friendly label

9 comments4 reactions1 assignee

Open

Add first-class JSON log output (Log4j2 JsonTemplateLayout) via env var

enhancementhelp wanted

itzg/docker-minecraft-server #3,870 opened Jan 14, 2026 · Shell · 13,694 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

1 comment1 reaction0 assignees

Open

Replace Guava `UnsignedBytes.checkedCast`

Guavagood first issue

bitcoinj/bitcoinj #4,009 opened Jan 13, 2026 · Java · 4,687 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

1 comment0 reactions1 assignee

Open

[BUG] geotile_grid aggregation on LineString maxes out CPU and stalls cluster

Search:Aggregationsbuggood first issue

opensearch-project/OpenSearch #20,413 opened Jan 13, 2026 · Java · 8,123 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

5 comments0 reactions1 assignee

Open

Nonsense LDAP queries from GET /admin/realms/{realm}/clients/{client-uuid}/roles/{role-name}/users

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

keycloak/keycloak #45,412 opened Jan 13, 2026 · Java · 34,398 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments2 reactions0 assignees

Open

Unable to install Forge versions on MC <1.6.1

enhancementhelp wanted

itzg/docker-minecraft-server #3,868 opened Jan 13, 2026 · Shell · 13,694 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

1 comment0 reactions0 assignees

Open

ST_Centroid (Java) does not comply with ISO spec

buggood first issue

prestodb/presto #26,947 opened Jan 12, 2026 · Java · 15,558 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

3 comments0 reactions0 assignees

Open

[Feature] Compatibility issue with Spring Boot 3.5.x + Spring Cloud 2025.0.0 + Spring Cloud Alibaba 2025.0.0.0 — Question about 2025 adaptation plan

help wanted

apache/dubbo #15,996 opened Jan 12, 2026 · Java · 41,524 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments0 reactions0 assignees

java

Open

[Feature Request] Provide official Debian (.deb) and RPM packages for standard installation

good first issuetype/feature-requestversion:4.2

StarRocks/starrocks #68,205 opened Jan 21, 2026 · Java · 5,717 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

5 comments0 reactions2 assignees

Open

Replace Guava Throwables.getRootCause() with helper

Guavagood first issue

bitcoinj/bitcoinj #4,033 opened Jan 20, 2026 · Java · 4,687 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

keycloak_user_events_total metric contains empty labels

area/observabilityhelp wantedkind/bugpriority/normalstatus/auto-bumpstatus/reopenedteam/cloud-nativeteam/production-readiness

keycloak/keycloak #45,582 opened Jan 19, 2026 · Java · 34,398 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

1 comment2 reactions2 assignees

Open

Provide a thread pool that limits virtual threads creation

EnhancementHelp Wanted

jetty/jetty.project #14,362 opened Jan 19, 2026 · Java · 3,701 stars

Why recommendedNo assignee yet · No comments yet

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

0 comments0 reactions0 assignees

Open

invite-existing-user API should reject invitations for users already in the organization

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

keycloak/keycloak #45,553 opened Jan 19, 2026 · Java · 34,398 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment3 reactions0 assignees

Open

Android TV stuck on v3.10

Area-PlayStoreEnvironment-AndroidTVIssue-Severe (high)help wanted

TeamAmaze/AmazeFileManager #4,556 opened Jan 18, 2026 · Java · 4,883 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment1 reaction0 assignees

Open

[Feature][Connector] Add Informix CDC Connector

help wanted

apache/seatunnel #10,359 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

3 comments0 reactions0 assignees

Open

[Feature][Connector] Add HubSpot Source Connector

good first issuehelp wanted

apache/seatunnel #10,358 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedHas a beginner-friendly label

Has a beginner-friendly label

3 comments0 reactions1 assignee

Open

[Feature][Connector] Add Azure CosmosDB Source Connector

good first issuehelp wanted

apache/seatunnel #10,357 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

2 comments0 reactions0 assignees

Open

Differences between monitoring ThreadPoolExecutor and ForkJoinPool

enhancementhelp wanted

micrometer-metrics/micrometer #7,089 opened Jan 16, 2026 · Java · 4,220 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

5 comments0 reactions0 assignees

Open

Help needed in getting bazel build command working on Windows from a mapped network drive

P3area-Windowsawaiting-user-responsehelp wantedteam-OSS

bazelbuild/bazel #28,321 opened Jan 16, 2026 · Java · 25,384 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

20 comments0 reactions0 assignees

Open

[Question] [Alert-http] Alert test sending failed, [Call method to Host(ip=dolphinscheduler-alert-67b7c695cb-v9b82, port=50052) failed]

help wantedimprovementkubernetes

apache/dolphinscheduler #17,883 opened Jan 16, 2026 · Java · 11,659 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

16 comments0 reactions0 assignees

Open

[Improve][Core] Support for Apache Flink 2.x

help wanted

apache/seatunnel #10,353 opened Jan 16, 2026 · Java · 6,897 stars

Why recommendedHas a beginner-friendly label

Has a beginner-friendly label

9 comments4 reactions1 assignee

Open

Add first-class JSON log output (Log4j2 JsonTemplateLayout) via env var

enhancementhelp wanted

itzg/docker-minecraft-server #3,870 opened Jan 14, 2026 · Shell · 13,694 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

1 comment1 reaction0 assignees

Open

Replace Guava `UnsignedBytes.checkedCast`

Guavagood first issue

bitcoinj/bitcoinj #4,009 opened Jan 13, 2026 · Java · 4,687 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

1 comment0 reactions1 assignee

Open

[BUG] geotile_grid aggregation on LineString maxes out CPU and stalls cluster

Search:Aggregationsbuggood first issue

opensearch-project/OpenSearch #20,413 opened Jan 13, 2026 · Java · 8,123 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

5 comments0 reactions1 assignee

Open

Nonsense LDAP queries from GET /admin/realms/{realm}/clients/{client-uuid}/roles/{role-name}/users

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

keycloak/keycloak #45,412 opened Jan 13, 2026 · Java · 34,398 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments2 reactions0 assignees

Open

Unable to install Forge versions on MC <1.6.1

enhancementhelp wanted

itzg/docker-minecraft-server #3,868 opened Jan 13, 2026 · Shell · 13,694 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

1 comment0 reactions0 assignees

Open

ST_Centroid (Java) does not comply with ISO spec

buggood first issue

prestodb/presto #26,947 opened Jan 12, 2026 · Java · 15,558 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

3 comments0 reactions0 assignees

Open

[Feature] Compatibility issue with Spring Boot 3.5.x + Spring Cloud 2025.0.0 + Spring Cloud Alibaba 2025.0.0.0 — Question about 2025 adaptation plan

help wanted

apache/dubbo #15,996 opened Jan 12, 2026 · Java · 41,524 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments0 reactions0 assignees

java

Loading results...

Open

[Feature Request] Provide official Debian (.deb) and RPM packages for standard installation

good first issuetype/feature-requestversion:4.2

StarRocks/starrocks #68,205 opened Jan 21, 2026 · Java · 5,717 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

5 comments0 reactions2 assignees

Open

Replace Guava Throwables.getRootCause() with helper

Guavagood first issue

bitcoinj/bitcoinj #4,033 opened Jan 20, 2026 · Java · 4,687 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

keycloak_user_events_total metric contains empty labels

area/observabilityhelp wantedkind/bugpriority/normalstatus/auto-bumpstatus/reopenedteam/cloud-nativeteam/production-readiness

keycloak/keycloak #45,582 opened Jan 19, 2026 · Java · 34,398 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

1 comment2 reactions2 assignees

Open

Provide a thread pool that limits virtual threads creation

EnhancementHelp Wanted

jetty/jetty.project #14,362 opened Jan 19, 2026 · Java · 3,701 stars

Why recommendedNo assignee yet · No comments yet

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

0 comments0 reactions0 assignees

Open

invite-existing-user API should reject invitations for users already in the organization

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

keycloak/keycloak #45,553 opened Jan 19, 2026 · Java · 34,398 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment3 reactions0 assignees

Open

Android TV stuck on v3.10

Area-PlayStoreEnvironment-AndroidTVIssue-Severe (high)help wanted

TeamAmaze/AmazeFileManager #4,556 opened Jan 18, 2026 · Java · 4,883 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment1 reaction0 assignees

Open

[Feature][Connector] Add Informix CDC Connector

help wanted

apache/seatunnel #10,359 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

3 comments0 reactions0 assignees

Open

[Feature][Connector] Add HubSpot Source Connector

good first issuehelp wanted

apache/seatunnel #10,358 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedHas a beginner-friendly label

Has a beginner-friendly label

3 comments0 reactions1 assignee

Open

[Feature][Connector] Add Azure CosmosDB Source Connector

good first issuehelp wanted

apache/seatunnel #10,357 opened Jan 17, 2026 · Java · 6,897 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

2 comments0 reactions0 assignees

Open

Differences between monitoring ThreadPoolExecutor and ForkJoinPool

enhancementhelp wanted

micrometer-metrics/micrometer #7,089 opened Jan 16, 2026 · Java · 4,220 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

5 comments0 reactions0 assignees

Open

Help needed in getting bazel build command working on Windows from a mapped network drive

P3area-Windowsawaiting-user-responsehelp wantedteam-OSS

bazelbuild/bazel #28,321 opened Jan 16, 2026 · Java · 25,384 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

20 comments0 reactions0 assignees

Open

[Question] [Alert-http] Alert test sending failed, [Call method to Host(ip=dolphinscheduler-alert-67b7c695cb-v9b82, port=50052) failed]

help wantedimprovementkubernetes

apache/dolphinscheduler #17,883 opened Jan 16, 2026 · Java · 11,659 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

16 comments0 reactions0 assignees

Open

[Improve][Core] Support for Apache Flink 2.x

help wanted

apache/seatunnel #10,353 opened Jan 16, 2026 · Java · 6,897 stars

Why recommendedHas a beginner-friendly label

Has a beginner-friendly label

9 comments4 reactions1 assignee

Open

Add first-class JSON log output (Log4j2 JsonTemplateLayout) via env var

enhancementhelp wanted

itzg/docker-minecraft-server #3,870 opened Jan 14, 2026 · Shell · 13,694 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

1 comment1 reaction0 assignees

Open

Replace Guava `UnsignedBytes.checkedCast`

Guavagood first issue

bitcoinj/bitcoinj #4,009 opened Jan 13, 2026 · Java · 4,687 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

1 comment0 reactions1 assignee

Open

[BUG] geotile_grid aggregation on LineString maxes out CPU and stalls cluster

Search:Aggregationsbuggood first issue

opensearch-project/OpenSearch #20,413 opened Jan 13, 2026 · Java · 8,123 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

5 comments0 reactions1 assignee

Open

Nonsense LDAP queries from GET /admin/realms/{realm}/clients/{client-uuid}/roles/{role-name}/users

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

keycloak/keycloak #45,412 opened Jan 13, 2026 · Java · 34,398 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments2 reactions0 assignees

Open

Unable to install Forge versions on MC <1.6.1

enhancementhelp wanted

itzg/docker-minecraft-server #3,868 opened Jan 13, 2026 · Shell · 13,694 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly label

1 comment0 reactions0 assignees

Open

ST_Centroid (Java) does not comply with ISO spec

buggood first issue

prestodb/presto #26,947 opened Jan 12, 2026 · Java · 15,558 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

3 comments0 reactions0 assignees

Open

[Feature] Compatibility issue with Spring Boot 3.5.x + Spring Cloud 2025.0.0 + Spring Cloud Alibaba 2025.0.0.0 — Question about 2025 adaptation plan

help wanted

apache/dubbo #15,996 opened Jan 12, 2026 · Java · 41,524 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments0 reactions0 assignees

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Java Good First Issues