tomcat version resolution error for pattern "10.1.+": improper constraint: 10.1.+ #1219
Description
Staging a simple servlet app with java-buildpack v5.0.0 fails when specifying:
JBP_CONFIG_OPEN_JDK_JRE: '{ jre: { version: 17.+ } }'
JBP_CONFIG_TOMCAT: '{tomcat: { version: 10.1.+, external_configuration_enabled: true }, external_configuration: { version: "1.4.0", repository_root: "https://tomcat-config.cfapps.eu12.hana.ondemand.com" }}' - fails
Staging logs:
2026-03-23T16:07:25.29+0100 [STG/0] OUT Cell 0b7eac6c-982c-4602-bb14-1c0c9839e44a successfully created container for instance 2cf4a7cb-9f6a-4159-b736-49996404db1a
2026-03-23T16:07:25.60+0100 [STG/0] OUT Downloading app package...
2026-03-23T16:07:25.60+0100 [STG/0] OUT Downloading build artifacts cache...
2026-03-23T16:07:26.44+0100 [STG/0] OUT Downloaded app package (31.9M)
2026-03-23T16:07:29.65+0100 [STG/0] OUT Downloaded build artifacts cache (206.7M)
2026-03-23T16:07:31.00+0100 [STG/0] OUT -----> Download go 1.24.6
2026-03-23T16:07:35.14+0100 [STG/0] OUT -----> Running go build supply
2026-03-23T16:07:35.14+0100 [STG/0] ERR go: downloading go1.25.4 (linux/amd64)
2026-03-23T16:07:51.46+0100 [STG/0] OUT -----> Java Buildpack version 5.0.0
2026-03-23T16:07:51.46+0100 [STG/0] OUT -----> Supplying Java
2026-03-23T16:07:51.46+0100 [STG/0] OUT Detected container: Tomcat
2026-03-23T16:07:51.46+0100 [STG/0] OUT Selected JRE: OpenJDK
2026-03-23T16:07:51.46+0100 [STG/0] OUT -----> Installing OpenJDK JRE
2026-03-23T16:07:51.46+0100 [STG/0] OUT Installing OpenJDK 17.0.18+10
2026-03-23T16:07:51.46+0100 [STG/0] OUT -----> Installing openjdk 17.0.18+10
2026-03-23T16:07:51.46+0100 [STG/0] OUT Download [https://buildpacks.cloudfoundry.org/dependencies/openjdk/openjdk_17.0.18%2B10_linux_x64_any-stack_5c495a4f.tgz]
2026-03-23T16:07:53.43+0100 [STG/0] OUT Detected Java major version: 17
2026-03-23T16:07:53.43+0100 [STG/0] OUT Installing JVMKill Agent
2026-03-23T16:07:53.43+0100 [STG/0] OUT -----> Installing jvmkill 1.17.0
2026-03-23T16:07:53.43+0100 [STG/0] OUT Copy [/tmp/cache/final/dependencies/07ad75beee5ebc28f478abf4f68f15072e1277f6a29a194ee76368e7d210baee/jvmkill-1.17.0-RELEASE.so]
2026-03-23T16:07:53.44+0100 [STG/0] OUT JVMKill Agent installed to /tmp/contents961684101/deps/0/jre/bin/jvmkill-1.17.0.so
2026-03-23T16:07:53.44+0100 [STG/0] OUT Installing Memory Calculator
2026-03-23T16:07:53.44+0100 [STG/0] OUT -----> Installing memory-calculator 4.2.0
2026-03-23T16:07:53.44+0100 [STG/0] OUT Copy [/tmp/cache/final/dependencies/2490b3dc0ab98eb25ae01d942c1c91f5a712245e0c7533532b87fcee60a328c9/memory-calculator-4.2.0.tgz]
2026-03-23T16:07:53.49+0100 [STG/0] OUT Memory Calculator installed: Loaded Classes: 18135, Threads: 250
2026-03-23T16:07:53.49+0100 [STG/0] OUT OpenJDK JRE installation complete
2026-03-23T16:07:53.49+0100 [STG/0] OUT JRE installation complete: OpenJDK 17.0.18+10
2026-03-23T16:07:53.49+0100 [STG/0] OUT -----> Installing frameworks
2026-03-23T16:07:53.49+0100 [STG/0] OUT Detected frameworks: [Client Certificate Mapper,Container Security Provider,JMX,Java Opts]
2026-03-23T16:07:53.49+0100 [STG/0] OUT Installing framework: Client Certificate Mapper
2026-03-23T16:07:53.49+0100 [STG/0] OUT -----> Installing Client Certificate Mapper
2026-03-23T16:07:53.49+0100 [STG/0] OUT -----> Installing client-certificate-mapper 2.0.1
2026-03-23T16:07:53.49+0100 [STG/0] OUT Copy [/tmp/cache/final/dependencies/70a0133aec07bbc310eea90dd90c988affe7e55c78e312ddbf7ca54e7e284378/client-certificate-mapper-2.0.1.jar]
2026-03-23T16:07:53.49+0100 [STG/0] OUT Installed Client Certificate Mapper version 2.0.1
2026-03-23T16:07:53.49+0100 [STG/0] OUT Installing framework: Container Security Provider
2026-03-23T16:07:53.49+0100 [STG/0] OUT -----> Installing Container Security Provider
2026-03-23T16:07:53.49+0100 [STG/0] OUT -----> Installing container-security-provider 1.20.0
2026-03-23T16:07:53.49+0100 [STG/0] OUT Copy [/tmp/cache/final/dependencies/26507de65a362d3c2c53fe394c672326ba7c571cc8a8c310352aec02673cd329/container-security-provider-1.20.0-RELEASE.jar]
2026-03-23T16:07:53.50+0100 [STG/0] OUT Installed Container Security Provider version 1.20.0
2026-03-23T16:07:53.50+0100 [STG/0] OUT Installing framework: JMX
2026-03-23T16:07:53.50+0100 [STG/0] OUT -----> JMX enabled on port 5000
2026-03-23T16:07:53.50+0100 [STG/0] OUT Installing framework: Java Opts
2026-03-23T16:07:53.50+0100 [STG/0] OUT -----> Supplying Tomcat
2026-03-23T16:07:53.50+0100 [STG/0] OUT Using Tomcat 10.1.+ for Java 17
2026-03-23T16:07:53.50+0100 [STG/0] OUT **ERROR** Failed to supply container: tomcat version resolution error for pattern "10.1.+": improper constraint: 10.1.+
2026-03-23T16:07:53.55+0100 [STG/0] ERR Failed to compile droplet: Failed to run all supply scripts: exit status 14
When changing the tomcat verion to 10.+ (instead of 10.1.+), staging succeeds:
JBP_CONFIG_TOMCAT: '{tomcat: { version: 10.+, external_configuration_enabled: true }, external_configuration: { version: "1.4.0", repository_root: "https://tomcat-config.cfapps.eu12.hana.ondemand.com" }}' - fails
Removing the external configuration for tomcat doesn't make a difference.
The same application could be pushed w/o problems using an older version of the java-buildpack from the golang branch: https://github.com/stephanme/java-buildpack/tree/feature/go-migration (version from ~18th Feb).