AppCDS in 25 failing for JRuby command line

Thu Oct 2 17:09:07 UTC 2025

Full output as a gist:
https://gist.github.com/headius/88d91118ef1487b4fbff357fecf06904

On Thu, Oct 2, 2025 at 12:03 PM Charles Oliver Nutter <headius at headius.com>
wrote:

> Here's the full -Xlog:aot,cds output. Nothing jumps out at me. It seems to
> be confused about which modules are specified at dump time, even though the
> same command line sees those modules at runtime.
>
> [0.010s][info][cds] trying to map
> /Library/Java/JavaVirtualMachines/zulu-25.jdk/Contents/Home/lib/server/classes.jsa
> [0.010s][info][cds] Opened shared archive file
> /Library/Java/JavaVirtualMachines/zulu-25.jdk/Contents/Home/lib/server/classes.jsa.
> [0.010s][info][cds] The shared archive file was created with
> UseCompressedOops = 1, UseCompressedClassPointers = 1,
> UseCompactObjectHeaders = 0
> [0.010s][info][cds] Core region alignment: 16384
> [0.010s][info][cds] trying to map
> /Users/headius/work/jruby/lib/jruby-java25.jsa
> [0.010s][info][cds] Opened shared archive file
> /Users/headius/work/jruby/lib/jruby-java25.jsa.
> [0.010s][info][cds] The shared archive file was created with
> UseCompressedOops = 1, UseCompressedClassPointers = 1,
> UseCompactObjectHeaders = 0
> [0.010s][info][cds] optimized module handling: disabled because archive
> was created without optimized module handling
> [0.010s][info][cds] ArchiveRelocationMode: 1
> [0.010s][info][cds] ArchiveRelocationMode == 1: always map archive(s) at
> an alternative address
> [0.010s][info][cds] Try to map archive(s) at an alternative address
> [0.010s][info][cds] Reserved archive_space_rs [0x0000000f00000000 -
> 0x0000000f03000000] (50331648) bytes (includes protection zone)
> [0.010s][info][cds] Reserved class_space_rs   [0x0000000f03000000 -
> 0x0000000f43000000] (1073741824) bytes
> [0.010s][info][cds] Mapped static  region #0 at base 0x0000000f00004000
> top 0x0000000f004b0000 (ReadWrite)
> [0.010s][info][cds] Mapped static  region #1 at base 0x0000000f004b0000
> top 0x0000000f00d94000 (ReadOnly)
> [0.010s][info][cds] Mapped static  region #2 at base 0x00000001009d8000
> top 0x0000000100a0c000 (Bitmap)
> [0.020s][error][cds] An error has occurred while processing the shared
> archive file. Run with -Xlog:aot,cds for details.
> [0.020s][error][cds] optimized module handling: disabled because extra
> module path(s) are specified
> [0.020s][info ][cds] archived module property jdk.module.main: (null)
> [0.020s][info ][cds] archived module property jdk.module.addexports: (null)
> [0.020s][info ][cds] archived module property jdk.module.addmods: (null)
> [0.020s][info ][cds] archived module property
> jdk.module.enable.native.access: (null)
> [0.020s][error][cds] Mismatched values for property
> jdk.module.enable.native.access: org.jruby.dist specified during runtime
> but not during dump time
> [0.020s][error][cds] Disabling optimized module handling
> [0.020s][info ][cds] archived module property jdk.module.addopens: (null)
> [0.020s][error][cds] Mismatched values for property jdk.module.addopens:
> java.base/java.io
> =org.jruby.dist,java.base/java.nio.channels=org.jruby.dist,java.base/
> sun.nio.ch=org.jruby.dist,java.management/sun.management=org.jruby.dist
> specified during runtime but not during dump time
> [0.020s][error][cds] Disabling optimized module handling
> [0.020s][info ][cds] archived module property jdk.module.addreads: (null)
> [0.020s][info ][cds] optimized module handling: disabled
> [0.020s][info ][cds] full module graph: disabled
> [0.021s][info ][cds] Mapped dynamic region #0 at base 0x0000000f00d94000
> top 0x0000000f01a80000 (ReadWrite)
> [0.021s][info ][cds] Mapped dynamic region #1 at base 0x0000000f01a80000
> top 0x0000000f02b4c000 (ReadOnly)
> [0.021s][info ][cds] Mapped dynamic region #2 at base 0x0000000101a8c000
> top 0x0000000101afc000 (Bitmap)
> [0.025s][info ][cds] CDS archive was created with max heap size = 128M,
> and the following configuration:
> [0.025s][info ][cds]     narrow_klass_base at mapping start address,
> narrow_klass_pointer_bits = 32, narrow_klass_shift = 0
> [0.025s][info ][cds]     narrow_oop_mode = 1, narrow_oop_base =
> 0x0000000000000000, narrow_oop_shift = 3
> [0.025s][info ][cds] The current max heap size = 6144M,
> G1HeapRegion::GrainBytes = 4194304
> [0.025s][info ][cds]     narrow_klass_base = 0x0000000f00000000,
> arrow_klass_pointer_bits = 32, narrow_klass_shift = 0
> [0.025s][info ][cds]     narrow_oop_mode = 1, narrow_oop_base =
> 0x0000000000000000, narrow_oop_shift = 3
> [0.025s][info ][cds]     heap range = [0x0000000680000000 -
> 0x0000000800000000]
> [0.025s][info ][cds] Preferred address to map heap data (to avoid
> relocation) is 0x00000007ffe00000
> [0.025s][info ][cds] Heap data mapped at 0x00000007ffc00000, size =
>  1177848 bytes
> [0.025s][info ][cds] CDS heap data relocation delta = -2097152 bytes
> [0.025s][info ][aot] initial optimized module handling: disabled
> [0.025s][info ][aot] initial full module graph: disabled
> [0.025s][info ][aot] patching heap embedded pointers: narrowOop 0xfffc0000
> -> 0xfff80000
> [0.025s][info ][aot] heap data relocation quick delta = 0xfffc0000
> [0.027s][info ][cds] Unmapping region #2 at base 0x00000001009d8000
> (Bitmap)
> [0.027s][info ][cds] Unmapping region #2 at base 0x0000000101a8c000
> (Bitmap)
> [0.027s][info ][aot] Using AOT-linked classes: false (static archive: no
> aot-linked classes, dynamic archive: no aot-linked classes)
>
> On Thu, Oct 2, 2025 at 11:58 AM Charles Oliver Nutter <headius at headius.com>
> wrote:
>
>> Hello friends!
>>
>> I was doing some testing of AppCDS on JDK 25, in hopes of having our
>> Docker images pre-generate an AppCDS archive. But I discovered an issue...
>> AppCDS does not appear to like the JRuby command line anymore in JDK 25.
>>
>> Here's part of a session where I delete the old AppCDS archive and then
>> run the same command line twice with AutoCreateSharedArchive. The archive
>> generates ok in the first command, but then is rejected by the second
>> command:
>>
>> [] jdk25 $ rm /Users/headius/work/jruby/lib/jruby-java25.jsa
>> [] jdk25 $
>> /Library/Java/JavaVirtualMachines/zulu-25.jdk/Contents/Home/bin/java
>> @/Users/headius/work/jruby/bin/.jruby.java_opts
>> @/Users/headius/work/jruby/bin/.jruby.module_opts -Xss2048k
>> -Djffi.boot.library.path=/Users/headius/work/jruby/lib/jni
>> -Djava.security.egd=file:/dev/urandom -XX:+AutoCreateSharedArchive
>> -XX:SharedArchiveFile=/Users/headius/work/jruby/lib/jruby-java25.jsa
>> --enable-native-access=org.jruby.dist --sun-misc-unsafe-memory-access=allow
>> --module-path /Users/headius/work/jruby/lib/jruby.jar -classpath :
>> -Djruby.home=/Users/headius/work/jruby
>> -Djruby.lib=/Users/headius/work/jruby/lib -Djruby.script=jruby
>> -Djruby.shell=/bin/sh org.jruby.Main -e 1
>> [1.074s][warning][cds] Skipping jdk/proxy2/$Proxy13: Unsupported location
>> [1.074s][warning][cds] Skipping jdk/proxy2/$Proxy25: Unsupported location
>> [1.074s][warning][cds] Skipping org/joda/time/field/MillisDurationField:
>> Old class has been linked
>> ...
>> [1.076s][warning][cds] Skipping org/jruby/org/objectweb/asm/ClassWriter:
>> Old class has been linked
>> [1.076s][warning][cds] Skipping
>> org/joda/time/format/DateTimeFormatterBuilder$PaddedNumber: Old class has
>> been linked
>> [] jdk25 $
>> /Library/Java/JavaVirtualMachines/zulu-25.jdk/Contents/Home/bin/java
>> @/Users/headius/work/jruby/bin/.jruby.java_opts
>> @/Users/headius/work/jruby/bin/.jruby.module_opts -Xss2048k
>> -Djffi.boot.library.path=/Users/headius/work/jruby/lib/jni
>> -Djava.security.egd=file:/dev/urandom -XX:+AutoCreateSharedArchive
>> -XX:SharedArchiveFile=/Users/headius/work/jruby/lib/jruby-java25.jsa
>> --enable-native-access=org.jruby.dist --sun-misc-unsafe-memory-access=allow
>> --module-path /Users/headius/work/jruby/lib/jruby.jar -classpath :
>> -Djruby.home=/Users/headius/work/jruby
>> -Djruby.lib=/Users/headius/work/jruby/lib -Djruby.script=jruby
>> -Djruby.shell=/bin/sh org.jruby.Main -e 1
>> [0.008s][error][cds] An error has occurred while processing the shared
>> archive file. Run with -Xlog:aot,cds for details.
>> [0.008s][error][cds] optimized module handling: disabled because extra
>> module path(s) are specified
>> [0.008s][error][cds] Mismatched values for property
>> jdk.module.enable.native.access: org.jruby.dist specified during runtime
>> but not during dump time
>> [0.008s][error][cds] Disabling optimized module handling
>> [0.008s][error][cds] Mismatched values for property jdk.module.addopens:
>> java.base/java.io
>> =org.jruby.dist,java.base/java.nio.channels=org.jruby.dist,java.base/
>> sun.nio.ch=org.jruby.dist,java.management/sun.management=org.jruby.dist
>> specified during runtime but not during dump time
>> [0.008s][error][cds] Disabling optimized module handling
>>
>> The errors make no sense because I'm doing exactly the same thing in both
>> command lines.
>>
>> Here's the contents of the
>> /Users/headius/work/jruby/bin/.jruby.module_opts file (the .jruby.java_opts
>> file is empty):
>>
>> --add-opens java.base/java.io=org.jruby.dist
>> --add-opens java.base/java.nio.channels=org.jruby.dist
>> --add-opens java.base/sun.nio.ch=org.jruby.dist
>> --add-opens java.management/sun.management=org.jruby.dist
>>
>> Running the same commands against JDK 21 works just fine... the jsa file
>> is generated and used correctly. Is there something I'm doing wrong with
>> this command line that JDK 25 does not like?
>>
>> I can re-test with another JDK if necessary. Let me know if I should open
>> a bug for this.
>>
>> Reproduce by downloading JRuby from https://jruby.org and unpacking. It
>> runs out of the box.
>>
>> *Charles Oliver Nutter*
>> *Architect and Technologist*
>> Headius Enterprises
>> https://www.headius.com
>> headius at headius.com
>>
>
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