killbill/killbill

View on GitHub

Open-Source Subscription Billing & Payments Platform

Stars: 5.8k
Forks: 959
Open beginner issues: 0
Indexed issues: 244

Dominant language: Java
License: Apache-2.0
Last GitHub push: Aug 20, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

244 open issues indexed

Plugin ordering: no deterministic ordering mechanism for entitlement, catalog and usage plugin APIs Open

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

killbill/killbill#2310 · Opened Aug 27, 2026
Repeated blockBilling on a multi-month billing period produces overlapping RECURRING terms → ILLEGAL INVOICING STATE, account parked Open

OVERDUE

killbill/killbill#2306 · 1 assignee · Opened Aug 21, 2026
Add Support For Partial locale in invoice/catalog translations Open

INVOICE

killbill/killbill#2304 · 1 assignee · Opened Aug 20, 2026
Overdue: reevaluation schedule is not re-anchored when the earliest unpaid invoice date changes, causing a configured state to be skipped Open

killbill/killbill#2297 · 1 assignee · Opened Aug 9, 2026
Catalog changes for existing subscriptions are silently dropped when org.killbill.subscription.align.effectiveDateForExistingSubscriptions=true Open

killbill/killbill#2291 · 1 assignee · Opened Jul 31, 2026
Refactor `HtmlInvoiceGenerator` to support shared tenant branding (logo, company info, brand colors) Open

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

killbill/killbill#2283 · Opened Jul 27, 2026
Configure global lock retries and queue reschedule intervals for robust concurrency handling Open

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

killbill/killbill#2280 · Opened Jul 23, 2026
Large invoice creation fails because billing_events exceeds BLOB limit Open

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

killbill/killbill#2278 · 2 reactions · Opened Jul 20, 2026
Ability to include new add-ons on older version base plans Open

CATALOG

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

killbill/killbill#2261 · 1 reaction · Opened Jun 17, 2026
Enhance catalog plugin API to fetch shallow catalog Open

api CATALOG performance

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

killbill/killbill#2258 · Opened Jun 16, 2026
Enhance usage plugin Api to pass all transitions Open

api enhancement USAGE

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

killbill/killbill#2257 · Opened Jun 16, 2026
[Security] Support for OIDC compliant vendor Open

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

killbill/killbill#2256 · 4 comments · Opened Jun 15, 2026
[Security] AdminResource endpoints lack permission checks, allowing any authenticated user to disrupt server health and read internal queue data Open

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

killbill/killbill#2251 · 2 comments · Opened Jun 3, 2026
Add API to List All Available Role Definitions Open

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

killbill/killbill#2250 · 1 comment · Opened Jun 1, 2026
Dry-run invoice does not show exact invoice Open

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

killbill/killbill#2249 · Opened May 29, 2026
Security concern: api_secret and api_salt stored in tenants table Open

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

killbill/killbill#2248 · Opened May 29, 2026
Limitations with process notifications and non signed webhooks Open

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

killbill/killbill#2227 · Opened May 19, 2026
BCD_UPDATE event does not seem to be returned from subscription events Open

ENTITLEMENT SUBSCRIPTION_BASE

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

killbill/killbill#2224 · Opened May 14, 2026
[Invoice] Tighten lock-failure retry handling for consistency across all paths Open

enhancement INVOICE

killbill/killbill#2207 · 1 reaction · 2 assignees · Opened Apr 27, 2026
Incorrect invoice items date for CBA_ADJ item Open

INVOICE

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

killbill/killbill#2202 · 1 comment · Opened Apr 20, 2026
handle undeclared mustache variables in upload templates Open

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

killbill/killbill#2197 · Opened Apr 9, 2026
TenantApi: add support to disable old key when `insertUserKeyValue()` Open

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

killbill/killbill#2196 · 1 comment · Opened Apr 7, 2026
Payment refund with invoice item adjustment does not save invoice item description Open

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

killbill/killbill#2191 · 1 comment · 1 reaction · Opened Mar 24, 2026
Inconsistency in createSubscriptionWithAddOns: billingDate vs billingStartDate Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

killbill/killbill#2189 · 1 comment · Opened Mar 10, 2026
Error during subscription creation/retrieval for certain catalogs Open

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

killbill/killbill#2177 · 1 comment · Opened Dec 18, 2025
Upgrade to java 17 Open

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

killbill/killbill#2176 · 1 comment · Opened Dec 5, 2025
Issue with subscription creation with usage price override Open

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

killbill/killbill#2167 · Opened Oct 13, 2025
Invalid Plan name added to Catalog under PriceLists section Open

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

killbill/killbill#2166 · 2 comments · Opened Oct 8, 2025
Subscription events past expiration dates cause NPE Open

bug SUBSCRIPTION_BASE

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

killbill/killbill#2163 · 2 comments · Opened Oct 2, 2025
Cannot list plugins Open

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

killbill/killbill#2162 · Opened Sep 30, 2025
Adopt Postgresql as the default database implementation Open

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

killbill/killbill#2157 · 1 comment · Opened Sep 18, 2025
Adopt UUIDv7 for all identifiers Open

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

killbill/killbill#2156 · 2 comments · Opened Sep 18, 2025
Creating/cancelling subscription for a currency missing in Catalog Open

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

killbill/killbill#2155 · Opened Sep 18, 2025
Invoicing externally rated usage Open

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

killbill/killbill#2152 · 2 comments · Opened Sep 9, 2025
Prevent any operation after a subscription has expired Open

JUNCTION

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

killbill/killbill#2150 · 1 comment · Opened Aug 21, 2025
I’m trying to upload a catalog using Kill Bill’s /1.0/kb/catalog/xml endpoint. Even though the XML validates successfully against catalog.xsd, the upload fails with the following error: Open

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

killbill/killbill#2148 · 3 comments · Opened Aug 4, 2025
ILLEGAL INVOICING STATE for in_arrrear subscription corner case Open

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

killbill/killbill#2131 · 1 comment · Opened Jun 11, 2025
IllegalAccessException in CatalogSafetyInitializer Open

bug CATALOG

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

killbill/killbill#2129 · Opened Jun 6, 2025
Issue in advanced search with PostgreSQL Open

bug

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

killbill/killbill#2127 · 1 comment · Opened Jun 2, 2025
StandaloneCatalogMapper does not handle well empty catalog Open

bug CATALOG

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

killbill/killbill#2124 · Opened May 16, 2025
Recurring invoiced generated for the previous day also when Subscription is UNBLOCKED Open

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

killbill/killbill#2123 · Opened May 14, 2025
Catalog initialization from plugin leads to lots of contention Open

CATALOG

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

killbill/killbill#2116 · Opened May 2, 2025
ILLEGAL INVOICING STATE Open

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

killbill/killbill#2109 · 2 comments · Opened Mar 7, 2025
Plugin Configuration is cached and not updated until Docker Container restarted Open

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

killbill/killbill#2107 · Opened Feb 27, 2025
Docker support install plugin on startup Open

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

killbill/killbill#2106 · Opened Feb 27, 2025
Refresh PaymentMethods is deleting my PaymentMethod Open

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

killbill/killbill#2100 · Opened Feb 12, 2025
NullPointerException when subscription is retrieved with the bundleId Open

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

killbill/killbill#2099 · 1 comment · 1 reaction · Opened Feb 12, 2025
Git Repository - Tenant Maintenance Utility Open

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

killbill/killbill#2097 · Opened Feb 11, 2025
Policy.xml - specify rules independently from the catalog.xml file Open

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

killbill/killbill#2096 · Opened Feb 11, 2025
Issue in subscription creation when it is created with an existing external key Open

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

killbill/killbill#2095 · 2 comments · Opened Feb 10, 2025

killbill/killbill

Get new issues in your inbox