issue and crash when testing premain on a real world large app
ioi.lam at oracle.com
ioi.lam at oracle.com
Thu Apr 24 20:41:18 UTC 2025
Hi Olivier,
Thank you for the bug report and information about
reproduction/work-around. I have created two tracking bugs:
https://bugs.openjdk.org/browse/JDK-8355555
[leyden] -XX:+ArchiveLoaderLookupCache fails with large
ConcurrentHashMap backing array
https://bugs.openjdk.org/browse/JDK-8355556
Bouncy Castle signed jar causes crash with AOT cache
Also, thank you for sharing the performance numbers. They are very
encouraging!
If you encounter other issues or have other requests, please feel free
to post to this mailing list. We will love to hear from our users.
Thanks
- Ioi
On 4/22/25 2:49 AM, Olivier Bourgain wrote:
> Hello,
>
> I tested the premain branch on a pretty large Spring Boot application
> (>1M loc, fat jar is about 240MB) and had two issues.
> First issue is similar to my previous issue
> https://mail.openjdk.org/pipermail/leyden-dev/2025-April/001875.html,
> I had to set -XX:-ArchiveLoaderLookupCache to avoid Leyden failing due
> to a large ConcurrentHashMap's backing array.
>
> Second issue is way worse, I had a segfault on application start.
> I tracked down the issue to:
> - use the Bouncy Castle security provider
> - run as a Spring Boot app.
>
> I created a reproducer there https://github.com/obourgain/leyden-crash
> I couldn't reproduce as a simple main, but it should be possible to
> reduce the size of the reproducer even more.
>
> Some observations:
> - During the aotconf creation, bouncy castle classes are excluded
> because they are from a signed jar like:Skipping
> org/bouncycastle/jcajce/provider/asymmetric/util/BaseKeyFactorySpi:
> Signed JAR- During the AOT cache creation there are a lot of warnings
> , it may be related to the crash:[1,064s][warning][cds,heap] Archive
> heap points to a static field that may hold a different value at
> runtime: [1,064s][warning][cds,heap] Field:
> sun/security/x509/AlgorithmId::SHA3_512withRSA_oid
> [1,064s][warning][cds,heap] Value: sun.security.util.ObjectIdentifier
> [1,064s][warning][cds,heap] {0x00000006000453b8} - klass:
> 'sun/security/util/ObjectIdentifier' - flags:
> [1,064s][warning][cds,heap] [1,064s][warning][cds,heap] - ---- fields
> (total size 4 words): [1,064s][warning][cds,heap] - private
> 'componentLen' 'I' @12 -1 (0xffffffff) [1,064s][warning][cds,heap] -
> private transient 'componentsCalculated' 'Z' @16 false (0x00)
> [1,064s][warning][cds,heap] - private 'encoding' '[B' @20
> [B{0x00000006000453d8} (0xc0008a7b) [1,064s][warning][cds,heap] -
> private volatile transient 'stringForm' 'Ljava/lang/String;' @24
> "2.16.840.1.101.3.4.3.16"{0x0000000600045378} (0xc0008a6f)
> [1,064s][warning][cds,heap] - private 'components'
> 'Ljava/lang/Object;' @28 null (0x00000000) [1,064s][warning][cds,heap]
> --- trace begin --- [1,064s][warning][cds,heap] [ 0]
> {0x0000000600043330} java.util.concurrent.ConcurrentHashMap::table
> (offset = 20) [1,064s][warning][cds,heap] [ 1] {0x0000000600043370}
> [Ljava.util.concurrent.ConcurrentHashMap$Node; @[87]
> [1,064s][warning][cds,heap] [ 2] {0x0000000600045358}
> java.util.concurrent.ConcurrentHashMap$Node::val (offset = 20)
> [1,064s][warning][cds,heap] [ 3] {0x00000006000453b8}
> sun.security.util.ObjectIdentifier [1,064s][warning][cds,heap] ---
> trace end ---- Sample Backtrace from the segfault:💣Program crashed:
> Bad pointer dereference at 0x0000000000000000 Thread 2 crashed: 0
> 0x0000000000000000 1 0x00000001132b5230 2 0x00000001132b0154 3
> JavaCalls::call_helper(JavaValue*, methodHandle const&,
> JavaCallArguments*, JavaThread*) + 988 in libjvm.dylib at
> make/hotspot/src/hotspot/share/runtime/javaCalls.cpp:415:7 4
> InstanceKlass::call_class_initializer(JavaThread*) + 764 in
> libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1777:5 5
> InstanceKlass::initialize_impl(JavaThread*) + 2748 in libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1331:7 6
> InstanceKlass::initialize_impl(JavaThread*) + 1540 in libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1292:20 7
> HeapShared::resolve_or_init_classes_for_subgraph_of(Klass*, bool,
> JavaThread*) + 900 in libjvm.dylib at
> make/hotspot/src/hotspot/share/cds/heapShared.cpp:1491:9 8
> HeapShared::initialize_from_archived_subgraph(JavaThread*, Klass*) +
> 336 in libjvm.dylib at
> make/hotspot/src/hotspot/share/cds/heapShared.cpp:1415:5 9
> JVM_InitializeFromArchive + 560 in libjvm.dylib at
> make/hotspot/src/hotspot/share/prims/jvm.cpp:3369:3 10
> 0x00000001132b8e80 11 0x00000001132b4a90 12 0x00000001132b0154 13
> JavaCalls::call_helper(JavaValue*, methodHandle const&,
> JavaCallArguments*, JavaThread*) + 988 in libjvm.dylib at
> make/hotspot/src/hotspot/share/runtime/javaCalls.cpp:415:7 14
> InstanceKlass::call_class_initializer(JavaThread*) + 764 in
> libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1777:5 15
> InstanceKlass::initialize_impl(JavaThread*) + 2748 in libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1331:7 16
> LinkResolver::resolve_static_call(CallInfo&, LinkInfo const&, bool,
> JavaThread*) + 152 in libjvm.dylib at
> make/hotspot/src/hotspot/share/interpreter/linkResolver.cpp:1116:21 17
> LinkResolver::resolve_invokestatic(CallInfo&, constantPoolHandle
> const&, int, JavaThread*) + 52 in libjvm.dylib at
> make/hotspot/src/hotspot/share/interpreter/linkResolver.cpp:1749:3 18
> LinkResolver::resolve_invoke(CallInfo&, Handle, constantPoolHandle
> const&, int, Bytecodes::Code, JavaThread*) + 116 in libjvm.dylib at
> make/hotspot/src/hotspot/share/interpreter/linkResolver.cpp:1708:39 19
> InterpreterRuntime::resolve_invoke(JavaThread*, Bytecodes::Code) + 748
> in libjvm.dylib at
> make/hotspot/src/hotspot/share/interpreter/interpreterRuntime.cpp:988:5
> 20 InterpreterRuntime::resolve_invokestatic(JavaThread*) + 420 in
> libjvm.dylib at
> make/hotspot/src/hotspot/share/interpreter/interpreterRuntime.cpp:952:3
> 21 InterpreterRuntime::resolve_from_cache(JavaThread*,
> Bytecodes::Code) + 2644 in libjvm.dylib at
> make/hotspot/src/hotspot/share/interpreter/interpreterRuntime.cpp:1167:37
> 22 0x00000001132c48c4 23 0x00000001132b0154 24
> JavaCalls::call_helper(JavaValue*, methodHandle const&,
> JavaCallArguments*, JavaThread*) + 988 in libjvm.dylib at
> make/hotspot/src/hotspot/share/runtime/javaCalls.cpp:415:7 25
> InstanceKlass::call_class_initializer(JavaThread*) + 764 in
> libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1777:5 26
> InstanceKlass::initialize_impl(JavaThread*) + 2748 in libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1331:7 27
> InstanceKlass::initialize_impl(JavaThread*) + 1540 in libjvm.dylib at
> make/hotspot/src/hotspot/share/oops/instanceKlass.cpp:1292:20 28
> HeapShared::init_classes_for_special_subgraph(Handle, JavaThread*) +
> 356 in libjvm.dylib at
> make/hotspot/src/hotspot/share/cds/heapShared.cpp:1387:13 29
> Threads::create_vm(JavaVMInitArgs*, bool*) + 1504 in libjvm.dylib at
> make/hotspot/src/hotspot/share/runtime/threads.cpp:808:5 30
> JNI_CreateJavaVM_inner(JavaVM_**, void**, void*) + 80 in libjvm.dylib
> at make/hotspot/src/hotspot/share/prims/jni.cpp:3587:12 31
> JNI_CreateJavaVM + 116 in libjvm.dylib at
> make/hotspot/src/hotspot/share/prims/jni.cpp:3678:14 32 InitializeJVM
> + 184 in libjli.dylib at
> make/src/java.base/share/native/libjli/java.c:1510:9 33 JavaMain + 256
> in libjli.dylib at
> make/src/java.base/share/native/libjli/java.c:494:10 34 ThreadJavaMain
> + 12 in libjli.dylib at
> make/src/java.base/macosx/native/libjli/java_md_macosx.m:679:29 35
> 0x0000000197d71c0c _pthread_start + 136 in libsystem_pthread.dylib
> With regards to performance, with disabling the loading of
> BouncyCastleProvider in the application, it starts way faster and with
> lower resources, impressive work.
>
> - baseline (extracted Spring Boot jar)
> Time (mean ± σ): 11.510 s ± 0.432 s [User: 32.354 s, System:
> 1.751 s]
>
> - Leyden main branch
> Time (mean ± σ): 6.031 s ± 0.090 s [User: 12.591 s, System:
> 0.513 s]
> aotcache file = 250 MB
>
> - Leyden premain branch
> Time (mean ± σ): 4.801 s ± 0.022 s [User: 6.662 s, System:
> 0.390 s]
> aotcache file = 300 MB
>
> Regards.
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