temporalio/sdk-java

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Temporal Java SDK

Stars: 433
Forks: 249
Open beginner issues: 0
Indexed issues: 214
Avg merge: 5d 6h
Merged PRs (30d): 26

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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214 open issues indexed

Test server: refused CancelTimer leaves the workflow task complete in memory but STARTED in history, so it is never timed out or redelivered Open

test server

Difficulty 4/5 3-5 days Newbie friendliness 42/100

temporalio/sdk-java#3088 · Opened Sep 17, 2026
Warn if the SDK tried to send a payload above a specific size - Java Open

temporalio/sdk-java#3059 · 1 assignee · Opened Sep 9, 2026
Allow configurable prefix for MDC keys Open

enhancement

temporalio/sdk-java#3058 · 1 assignee · Opened Sep 7, 2026
Promise.get(timeout, unit) throws a misleading TimeoutException when the workflow is canceled Open

temporalio/sdk-java#3026 · 1 comment · 1 assignee · Opened Aug 21, 2026
Timers are still not canceled if the condition is resolved Open

temporalio/sdk-java#3012 · 1 comment · 1 reaction · 1 assignee · Opened Aug 15, 2026
[kotlin] Replaying a workflow history across different compiler versions (e.g. 2.2.0 → 2.4.0) can cause NDE Open

temporalio/sdk-java#2989 · 1 comment · 1 assignee · Opened Aug 4, 2026
Retry transient errors in ActivityCompletionClient.heartbeat Open

enhancement

temporalio/sdk-java#2984 · 1 assignee · Opened Jul 31, 2026
Manual completion client's recordHeartbeat swallows cancellation, reset and pause exceptions Open

temporalio/sdk-java#2983 · 1 assignee · Opened Jul 31, 2026
`Async.function`/`Async.procedure` with a Kotlin method reference spawns a WorkflowThread per call instead of inlining, as it does the Java equivalent Open

temporalio/sdk-java#2981 · 1 comment · 1 assignee · Opened Jul 30, 2026
Add Spring AI 2.0.x / Spring Boot 4 support Open

ai-sdk enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

temporalio/sdk-java#2920 · 1 comment · Opened Jun 17, 2026
Jackson3JsonPayloadConverter(JsonMapper) constructor not visible to javac — only present in META-INF/versions/17/ Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

temporalio/sdk-java#2885 · 4 comments · 4 reactions · Opened May 20, 2026
SDK should log when WFT completion takes a long time - Java Open

temporalio/sdk-java#2883 · 1 assignee · Opened May 19, 2026
S3 External Storage Driver - Java Open

temporalio/sdk-java#2882 · 1 assignee · Opened May 19, 2026
Implement operator commands for Standalone Activities Open

enhancement

temporalio/sdk-java#2878 · 1 assignee · Opened May 19, 2026
workflowcheck OOM issues on large codebases Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

temporalio/sdk-java#2846 · Opened Apr 16, 2026
Temporal SDK gRPC calls fail with DEADLINE_EXCEEDED after node restart (GraalVM / K8s) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

temporalio/sdk-java#2840 · Opened Apr 14, 2026
SDK should fail workflow task if payloads size it known to be too large - Java Open

temporalio/sdk-java#2833 · 1 comment · 1 assignee · Opened Apr 7, 2026
Local activity executor pool exhaustion causes workflow to hang permanently — without possibility to recover without reset Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

temporalio/sdk-java#2823 · Opened Mar 31, 2026
[java] Support conflict token retry loop for schedule updates Open

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

temporalio/sdk-java#2809 · 1 comment · Opened Mar 16, 2026
ProtobufJsonPayloadConverter does not work correctly with shaded artifact Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

temporalio/sdk-java#2792 · 2 comments · Opened Feb 19, 2026
Several workflowcheck improvement suggestions Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

temporalio/sdk-java#2770 · 1 comment · Opened Jan 29, 2026
Maven plugin for workflowcheck Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

temporalio/sdk-java#2769 · Opened Jan 29, 2026
Gradle plugin for workflowcheck Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

temporalio/sdk-java#2768 · 2 reactions · Opened Jan 29, 2026
Tests not passing: TestStatsReporter Flush not flushing Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

temporalio/sdk-java#2750 · 2 comments · Opened Dec 28, 2025
@WorkflowImpl(workers = "...") should support Spring property placeholders like taskQueues does Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

temporalio/sdk-java#2747 · Opened Dec 12, 2025
activity_schedule_to_start_latency reports activity_type unexpectedly Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

temporalio/sdk-java#2733 · 1 comment · Opened Nov 19, 2025
Allow overriding of the Worker Deployment Version when invoking a Child Workflow Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

temporalio/sdk-java#2726 · Opened Nov 12, 2025
temporal java sdk is using an older version of grpc-netty-shaded with vulnerabilities Open

Difficulty 2/5 1-3 hours Newbie friendliness 62/100

temporalio/sdk-java#2676 · 8 comments · 2 reactions · Opened Oct 7, 2025
TestEnvironment with external service - failing tests throws IllegalStateException errors Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

temporalio/sdk-java#2674 · 1 comment · Opened Sep 29, 2025
TestWorkflowEnvironment#sleep hangs indefinitely Open

test server

Difficulty 4/5 3-5 days Newbie friendliness 35/100

temporalio/sdk-java#2670 · 1 comment · Opened Sep 25, 2025
Springboot Multi Namespace: Add annotation to specify Namespace a bean belongs too Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

temporalio/sdk-java#2656 · Opened Sep 8, 2025
TestWorkflowEnvironment sleep incorrect behaviour Open

test server

Difficulty 4/5 3-5 days Newbie friendliness 45/100

temporalio/sdk-java#2642 · 1 comment · 2 reactions · Opened Aug 26, 2025
TestWorkflowMutableStateImpl - race condition between TimerFired event and CancelTimer command Open

test server

Difficulty 4/5 3-5 days Newbie friendliness 48/100

temporalio/sdk-java#2606 · 1 comment · Opened Jul 27, 2025
Allow specifying activity options for specific activity call Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

temporalio/sdk-java#2598 · Opened Jul 15, 2025
Non-root namespace Spring dependencies fail on app startup Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

temporalio/sdk-java#2579 · 1 reaction · Opened Jun 30, 2025
`startUpdate` JavaDoc says "asynchronously" when it may not be Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

temporalio/sdk-java#2578 · 1 comment · Opened Jun 30, 2025
Support for ManualCompletion in TestActivity Env Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

temporalio/sdk-java#2573 · 1 comment · Opened Jun 26, 2025
[Feature Request] Add counter metric for unaccessed failed promises Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

temporalio/sdk-java#2538 · Opened May 27, 2025
Workflow instance should be accessible in test environment for simple assertion Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

temporalio/sdk-java#2521 · Opened May 13, 2025
Support pluggable workflow caches Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

temporalio/sdk-java#2499 · 1 comment · Opened May 1, 2025
Memo-s not present in listOpenWorkflowExecutions when running with temporal-testing Open

test server

Difficulty 4/5 3-5 days Newbie friendliness 45/100

temporalio/sdk-java#2480 · Opened Apr 17, 2025
[Java] Worker Versioning high level client Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

temporalio/sdk-java#2469 · Opened Apr 2, 2025
[Feature Request] Utility to detect when deadlock detector triggers Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

temporalio/sdk-java#2461 · 1 comment · Opened Mar 27, 2025
Marker Commands being sent with empty names in the wild Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

temporalio/sdk-java#2412 · 2 comments · 1 reaction · Opened Feb 10, 2025
Pure opentelemetry based tracing support instead of using tracershim Open

enhancement

temporalio/sdk-java#2394 · 3 comments · 9 reactions · 1 assignee · Opened Jan 30, 2025
Add `patched()` and `deprecatePatch()` APIs Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

temporalio/sdk-java#2393 · Opened Jan 29, 2025
TestWorkflowEnvironment issue with setting search attributes in ContinueAsNewOptions Open

test server

Difficulty 3/5 1-2 days Newbie friendliness 35/100

temporalio/sdk-java#2364 · 1 comment · Opened Jan 9, 2025
Clarify `UnableToAcquireLockException` Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 20/100

temporalio/sdk-java#2359 · Opened Jan 7, 2025
`taskTimeoutWillRescheduleTheTaskOnTheGlobalList ` on the test server is flaky Open

test server

Difficulty 3/5 1-2 days Newbie friendliness 35/100

temporalio/sdk-java#2333 · Opened Nov 28, 2024
TestWorkflowEnvironment does not allow signalWithStart when workflow already exists Open

test server

Difficulty 3/5 1-2 days Newbie friendliness 38/100

temporalio/sdk-java#2321 · 1 comment · Opened Nov 14, 2024

temporalio/sdk-java

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