Curated issues

Java Good First Issues

Browse open source issues tagged with Java in the issue metadata. Results stay focused on work that can become public contribution evidence.

Java

What this list is like

Average annotated difficulty: 3.8/5 across 308,568 issues.
8% of 308,568 time estimates are one day or less.

About Java

A statically typed, JVM-based language from Sun (1995), long the default for large server-side systems and Android apps.

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[Bug] [Connector-V2] [Http] A streaming Http source never completes a checkpoint: poll_interval_millis is waited out holding the checkpoint lock Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

apache/seatunnel#12411 · Opened Sep 20, 2026
wafv2: TagResource/UntagResource don't enforce the 50-tag limit or key/value length limits Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

floci-io/floci#4035 · Opened Sep 20, 2026
wafv2: WAFNonexistentItemException returns 404 instead of the documented 400 Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

floci-io/floci#4034 · Opened Sep 20, 2026
wafv2: TagResource/UntagResource have no test coverage for RegexPatternSet or RuleGroup Open

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

floci-io/floci#4033 · Opened Sep 20, 2026
[Bug]: 26.3 Missing directional_particles in ConsumeEffect Open

bug needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

Minestom/Minestom#3375 · Opened Sep 20, 2026
The `grepIn` javadoc example never matches real XMIR, so a user who copies it silently gets no optimization Open

Difficulty 1/5 Under an hour Newbie friendliness 94/100

objectionary/hone-maven-plugin#1061 · Opened Sep 20, 2026
`Docker.available()` waits on the one-hour build timeout, so a wedged daemon blocks the build for an hour on a boolean probe Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

objectionary/hone-maven-plugin#1060 · Opened Sep 20, 2026
Store the original domain event in the Namastack outbox Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

spring-projects/spring-modulith#1895 · Opened Sep 20, 2026
JSONPointer pre-existing bug in toURIFragment() Open

Fix before the next release

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

stleary/JSON-java#1082 · Opened Sep 20, 2026
New JSONPointer tests needed Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

stleary/JSON-java#1081 · Opened Sep 20, 2026
[BUG] test(redshift): a partially created shared cluster is never cleaned up Open

bug redshift

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

floci-io/floci#4002 · Opened Sep 20, 2026
[BUG] test(apigateway): the authorizer cleanup can return with deletes still in flight Open

apigateway apigatewayv2 bug

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

floci-io/floci#3999 · 1 comment · Opened Sep 20, 2026
[BUG] docs(cognito): the AuthFlow list advertises ADMIN_USER_SRP_AUTH, which does not exist in AWS Open

cognito documentation

Difficulty 1/5 Under an hour Newbie friendliness 92/100

floci-io/floci#3996 · Opened Sep 20, 2026
[BUG] ci: the first prefetch-images.sh call runs before shard.txt exists, so it is always a no-op Open

bug github-actions

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

floci-io/floci#3995 · Opened Sep 20, 2026
Docs: Broken link to catalog properties page in terms.md Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

apache/iceberg#18189 · Opened Sep 20, 2026
[Bug report] Web V2 OAuth token refresh fails with default provider Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

apache/gravitino#13356 · 1 comment · Opened Sep 20, 2026
[BUG] cache.type=redis 时图片预览必然 500（Redisson: map key can't be null） Open

Difficulty 1/5 1-3 hours Newbie friendliness 90/100

kekingcn/kkFileView#793 · 1 comment · Opened Sep 20, 2026
Invalid Java interface declaration in SmallRye GraphQL guide Open

area/graphql area/smallrye

Difficulty 1/5 Under an hour Newbie friendliness 95/100

quarkusio/quarkus#56884 · 1 comment · Opened Sep 20, 2026
[Request]: mirthsync Open

package-request

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

ScoopInstaller/Extras#18783 · Opened Sep 20, 2026
INCLUDE RAGE4J - Test your LLM apps like the rest of your Java code Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

jamesward/ai4jvm#123 · Opened Sep 20, 2026
Include DOKIMOS - The LLM evaluation framework for Java and Kotlin. Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

jamesward/ai4jvm#122 · Opened Sep 20, 2026
Include SMILE Java Open

Difficulty 1/5 Under an hour Newbie friendliness 72/100

jamesward/ai4jvm#121 · Opened Sep 20, 2026
SecureFileStore.readFully() may skip decryption when off > 0 and the destination prefix is zeroed Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

h2database/h2database#4405 · Opened Sep 20, 2026
[BUG] Lambda: Kinesis event source poller reads the wrong account Open

bug kinesis lambda

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

floci-io/floci#3955 · Opened Sep 19, 2026
[BUG] A virtual-hosted object key is truncated when it contains the bucket name as a segment Open

bug s3

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

floci-io/floci#3943 · Opened Sep 19, 2026
MisformattedTestData suggested fix wraps long `// BUG: Diagnostic contains: ` lines Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

google/error-prone#6130 · Opened Sep 19, 2026
Update documentation of HeFQUIN service Open

documentation

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

LiUSemWeb/HeFQUIN#722 · Opened Sep 19, 2026
The Unix sbt script ignores JAVA_HOME when picking the JVM (Windows honors it) Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

sbt/sbt#9794 · Opened Sep 19, 2026
[Homebrew] Deprecation notice for "the `verified` parameter in the `url` stanza is deprecated" Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

microsoft/aspire#20257 · Opened Sep 19, 2026
Modification time is not preserved when uploading MediaStore content via Android share Open

0. Needs triage bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

nextcloud/android#17675 · Opened Sep 19, 2026
Workflows do not declare least-privilege token permissions Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

objectionary/eo-http#61 · Opened Sep 19, 2026
XCOP workflow runs a moving action branch Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

objectionary/eo-http#60 · Opened Sep 19, 2026
PDD and xcop workflows run moving action branches Open

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

objectionary/jucs#132 · Opened Sep 19, 2026
titles workflow exposes the OpenAI key to a third-party action on every opened issue Open

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

objectionary/lints#1495 · Opened Sep 19, 2026
titles workflow exposes the OpenAI key to a third-party action on every opened issue Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

objectionary/eo#8853 · Opened Sep 19, 2026
RAG artifact pointer is not discovered when the extension is only a transitive dependency Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

quarkusio/quarkus-agent-mcp#280 · Opened Sep 19, 2026
bdd-report-plugin hosting request Open

hosting-request needs-fix on-hold security-audit-done

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

jenkins-infra/repository-permissions-updater#5316 · 15 comments · 1 reaction · Opened Sep 19, 2026
Maven workflow vulnerability: unsafe interpolation of github.ref_name into shell API URL Open

bug good-title

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

objectionary/lints#1494 · Opened Sep 19, 2026
`github.ref_name` improperly expands within a shell path in XSD workflow Open

bug good-title

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

objectionary/eo#8852 · Opened Sep 19, 2026
Security vulnerability in EO Telegram workflow: unsafe `github.ref_name` interpolation into shell command Open

bug good-title

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

objectionary/eo#8851 · Opened Sep 19, 2026
`Objectionary workflow's security vulnerability through direct interpolation of github.ref_name into a shell command` Open

bug good-title

Difficulty 2/5 1-3 hours Newbie friendliness 90/100

objectionary/eo#8850 · Opened Sep 19, 2026
benchmark.sh deletes CSV separators and fails with division by zero Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

objectionary/hone-maven-plugin#1047 · Opened Sep 19, 2026
hone-it.sh collides when coverage entries share a repository basename Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

objectionary/hone-maven-plugin#1046 · Opened Sep 19, 2026
`benchmark-diff.sh` truncates fractional part of benchmark deltas Open

bug good-title

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

objectionary/lints#1493 · Opened Sep 19, 2026
`objectionary.sh` incorrectly interprets ampersands in release tags during `sed` replacement Open

bug good-title

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

objectionary/eo#8848 · Opened Sep 19, 2026
[BUG] CloudWatch Metrics: JSON GetMetricStatistics ignores the Unit filter Open

bug cloudwatch

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

floci-io/floci#3909 · Opened Sep 19, 2026
Add ID facet to `/api/v1/books/facet` for single-book lookup Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

grimmory-tools/grimmory#2705 · 1 comment · Opened Sep 19, 2026
Five `du` runs and a full `diff` per class run even when `HONE_VERBOSE` is false Open

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

objectionary/hone-maven-plugin#1041 · Opened Sep 19, 2026
The failure message always says `exit code 1`, because `atomic_write` throws away the real exit code Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

objectionary/hone-maven-plugin#1040 · Opened Sep 19, 2026
`mount()` accepts a relative `hone.target` and turns the bind mount into a named Docker volume Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

objectionary/hone-maven-plugin#1034 · Opened Sep 19, 2026

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Java Good First Issues

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