eclipse-vertx/vert.x

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Vert.x is a tool-kit for building reactive applications on the JVM

Stars: 14.7k
Forks: 2.1k
Open beginner issues: 0
Indexed issues: 124
Avg merge: 1d 10h
Merged PRs (30d): 27

Dominant language: Java
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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124 issues indexed so far

Jackson 3 support does not work Closed

bug

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

eclipse-vertx/vert.x#6362 · Opened Sep 14, 2026
Investigate and fix io_uring HTTP/3 tests Open

bug

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

eclipse-vertx/vert.x#6342 · Opened Sep 3, 2026
Custom connection pool strategy in HttpClient Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

eclipse-vertx/vert.x#6312 · 2 comments · Opened Aug 14, 2026
Resolve files when absolute path is used, returns exception Open

bug

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

eclipse-vertx/vert.x#6280 · Opened Aug 4, 2026
NoStackTraceTimeoutException during connection to Kubernetes API server after upgrade to Spring Boot 4.0.3 Open

bug help wanted

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

eclipse-vertx/vert.x#6252 · 4 comments · Opened Jul 21, 2026
Large HTTP/2 request bodies (gRPC 10MB+) are extremely slow Closed

bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

eclipse-vertx/vert.x#6238 · Opened Jul 9, 2026
Add per-connection attachment storage to HttpConnectionInternal Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

eclipse-vertx/vert.x#6234 · Opened Jul 8, 2026
Summary of latest 60(to 28/6/2026) CI failures. Open

bug

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

eclipse-vertx/vert.x#6218 · 2 comments · Opened Jun 28, 2026
AddressResolverOptions does not accept bare IPv6 DNS server addresses Open

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

eclipse-vertx/vert.x#6194 · 3 comments · Opened Jun 15, 2026
5.1.x Jackson 3 make ObjectMapper configurable Open

enhancement

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

eclipse-vertx/vert.x#6168 · 3 comments · Opened Jun 8, 2026
Make sendFile fallback chunk size configurable Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 56/100

eclipse-vertx/vert.x#6160 · Opened Jun 4, 2026
Performance regression in HTTP/2 codec server path in 5.1.0 Open

bug

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

eclipse-vertx/vert.x#6143 · 2 comments · Opened May 30, 2026
Issue with testcontext documentation (all versions) Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

eclipse-vertx/vert.x#6139 · 3 comments · Opened May 29, 2026
Intermittent failures after tests migration Open

bug

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

eclipse-vertx/vert.x#6115 · 1 comment · Opened May 13, 2026
Expose Netty ioHandler configuration Open

enhancement help wanted

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

eclipse-vertx/vert.x#6105 · 4 comments · Opened May 5, 2026
Intermittent test exception: failed to register an accepted channel Closed

bug

eclipse-vertx/vert.x#6087 · 1 assignee · Opened Apr 27, 2026
Probably dispatch method should be reused inside emit Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

eclipse-vertx/vert.x#6086 · Opened Apr 23, 2026
NullPointerException in Http2ClientConnection.metricsEnd() when HTTP/2 stream ends before response headers are received Open

bug

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

eclipse-vertx/vert.x#6022 · Opened Mar 17, 2026
Multipart decoder retention on abort/reset/exception paths Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 32/100

eclipse-vertx/vert.x#6014 · 2 comments · Opened Mar 6, 2026
Handling of an error through a long chain of completions leads to StackOverflowError Open

question

Difficulty 4/5 3-5 days Newbie friendliness 25/100

eclipse-vertx/vert.x#5949 · 3 comments · Opened Feb 8, 2026
[Vert.x 5] Regression: setInstances(N) shares a single EventLoop for all instances when using ThreadingModel.VIRTUAL_THREAD Open

bug

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

eclipse-vertx/vert.x#5924 · 2 comments · Opened Feb 3, 2026
Breaking Change: NetClient.connect() connection timeout behavior changed in Vert.x 5 Open

bug

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

eclipse-vertx/vert.x#5916 · 4 comments · Opened Jan 29, 2026
My api latency went sky high after upgrading from 4.5.22 to 4.5.24 Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

eclipse-vertx/vert.x#5915 · 2 comments · Opened Jan 28, 2026
Unstable test Http2Test.testKeepAliveTimeout Open

bug

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

eclipse-vertx/vert.x#5865 · Opened Dec 27, 2025
Generated Java files are generated on Windows with LF, showing up in IDEs as modified Open

enhancement

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

eclipse-vertx/vert.x#5849 · Opened Dec 22, 2025
WebSocket Client Connection Evicted/Shutdown During Handshake in Vert.x 5.0.5 Open

bug

eclipse-vertx/vert.x#5839 · 11 comments · 1 assignee · Opened Dec 9, 2025
Increase HTTP/2 default initial window size defaults Open

enhancement

eclipse-vertx/vert.x#5837 · 1 assignee · Opened Dec 8, 2025
VirtualThread(s) context lookup relies on ThreadLocal(s) Open

bug

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

eclipse-vertx/vert.x#5817 · 1 comment · Opened Nov 25, 2025
Virtual thread not being used while using verticle deployed as ThreadingModel.VIRTUAL_THREAD in vertx httpclient Open

bug

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

eclipse-vertx/vert.x#5816 · 4 comments · Opened Nov 25, 2025
Auto scaling early support Open

enhancement

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

eclipse-vertx/vert.x#5774 · 2 reactions · Opened Nov 3, 2025
executeBlocking VirtualThread Open

enhancement

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

eclipse-vertx/vert.x#5769 · 5 comments · Opened Oct 29, 2025
HTTP/3 support Open

enhancement

eclipse-vertx/vert.x#5718 · 3 reactions · 1 assignee · Opened Sep 16, 2025
httpClient write h2 buffer failed Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

eclipse-vertx/vert.x#5708 · Opened Sep 7, 2025
HttpClient post MultiPartForm for HTTP/2 sets illegal header transfer-encoding Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

eclipse-vertx/vert.x#5690 · Opened Aug 31, 2025
SSE Open

enhancement

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

eclipse-vertx/vert.x#5682 · 4 comments · Opened Aug 23, 2025
Enable DNS Resolving via TCP in case of Timeout Open

enhancement

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

eclipse-vertx/vert.x#5676 · 11 comments · Opened Aug 13, 2025
Verticles undeploy management Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

eclipse-vertx/vert.x#5672 · 3 comments · Opened Aug 9, 2025
JDK17 model-info.java Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

eclipse-vertx/vert.x#5660 · 8 comments · Opened Jul 25, 2025
Investigate Netty virtual thread scheduler Open

enhancement

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

eclipse-vertx/vert.x#5624 · 5 reactions · Opened Jun 26, 2025
Vert.x 5 - Modularity Exposure / VertxThreadFactory Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

eclipse-vertx/vert.x#5615 · 2 comments · Opened Jun 17, 2025
vertx5 graalvm native binary throwing error Open

bug

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

eclipse-vertx/vert.x#5588 · 1 comment · Opened Jun 2, 2025
Maven central unable to render dependencies for io.vertx artefacts Open

bug

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

eclipse-vertx/vert.x#5573 · 1 comment · Opened May 16, 2025
[Feature] - Support vertx http server for closing of the handlers Open

enhancement

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

eclipse-vertx/vert.x#5565 · Opened May 12, 2025
HttpClient.send doesn't fail on ReadStream failure Open

bug

eclipse-vertx/vert.x#5550 · 7 comments · 1 assignee · Opened Apr 11, 2025
Automation analysis Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

eclipse-vertx/vert.x#5547 · Opened Apr 8, 2025
The DatagramSocketOptions in vertx.create DatagramSocket do not have setUseProxyProtocol and cannot be used through Channel. pipelin(). addLast (new HAProxyMessage Decoder) Open

enhancement

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

eclipse-vertx/vert.x#5532 · 5 comments · Opened Mar 27, 2025
IoUring async file Open

enhancement

eclipse-vertx/vert.x#5510 · 1 comment · 1 assignee · Opened Mar 9, 2025
Issue with GraalVM Native Image Unable to Connect to Kubernetes API Server Open

bug help wanted

Difficulty 4/5 3-5 days Newbie friendliness 25/100

eclipse-vertx/vert.x#5484 · 7 comments · Opened Feb 17, 2025
JsonObject : add further options on how to mergeIn JsonObject Open

enhancement

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

eclipse-vertx/vert.x#5453 · 2 comments · Opened Jan 20, 2025
HttpEventHandler.body should avoid being resized Open

enhancement

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

eclipse-vertx/vert.x#5444 · 13 comments · 1 reaction · Opened Jan 13, 2025

eclipse-vertx/vert.x

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