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<p>It seems like the error happens only when running in "training
mode". Can you try something like this to isolate the problem?<br>
</p>
<p> rm -f app.cds<br>
java -cp app.jar -XX:CacheDataStore
-XX:+UnlockDiagnosticVMOptions -XX:+CDSManualFinalImage AppMain</p>
<p>This will make sure that the app is executed with profile
collection enabled. The profile is written to the file
foo.cds.preimage.</p>
<p>Normally, after foo.cds.preimage is created, we fork a sub
process to consume foo.cds.preimage and write foo.cds.
-XX:+CDSManualFinalImage prevents the sub process from being
created.</p>
<p>If the above causes an error, but this doesn't (when running the
exact same workload)<br>
</p>
<p> java -cp app.jar -Xshare:off AppMain
</p>
<p>then we know that the error is triggered by the extra work
performed by the VM for collecting profiling information.<br>
</p>
<p>Thanks</p>
<p>- Ioi<br>
</p>
<div class="moz-cite-prefix">On 9/11/24 6:02 AM, Sebastien Deleuze
wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAG5jep8kCfuFELbN3T=aZds3=UvMCWL64LrD=yPd58KYJXHaPA@mail.gmail.com">
<div dir="ltr">After adding more logging, I can confirm the
original exception when -XX:CacheDataStore is set with no
existing CDS file is thrown by MethodHandles.Lookup#defineClass
and is similar to the second one I reported.
<div>This is a class that Spring Data generates during runtime.<br>
<br>
java.lang.VerifyError: Bad local variable type<br>
Exception Details:<br>
Location:<br>
org/springframework/samples/petclinic/owner/Owner_Accessor_yw4ckn.getProperty(Lorg/springframework/data/mapping/PersistentProperty;)Ljava/lang/Object;
@83: aload_2<br>
Reason:<br>
Type top (current frame, locals[2]) is not assignable to
reference type<br>
Current Frame:<br>
bci: @83<br>
flags: { }<br>
locals: {
'org/springframework/samples/petclinic/owner/Owner_Accessor_yw4ckn',
'org/springframework/data/mapping/PersistentProperty' }<br>
stack: { 'java/lang/invoke/MethodHandle' }<br>
Bytecode:<br>
0000000: 2b12 7db8 0027 2ab4 0029 4d2b b900 8301<br>
0000010: 00b6 0089 ab00 0000 0000 006c 0000 0006<br>
0000020: a900 4641 0000 004c bb97 9bf4 0000 0054<br>
0000030: 0000 0d1b 0000 003c 002e 996b 0000 005c<br>
0000040: 07ea e95b 0000 0044 2eae b404 0000 0064<br>
0000050: b200 4a2c b600 a5b0 b200 532c b600 a5b0<br>
0000060: b200 592c b600 a5b0 b200 5f2c b600 a5b0<br>
0000070: b200 652c b600 a5b0 b200 6b2c b600 a5b0<br>
0000080: bb00 9159 12a7 04bd 0004 5903 2b53 b800<br>
0000090: 97b7 009a bf <br>
Stackmap Table:<br>
same_frame_extended(@80)<br>
same_frame(@88)<br>
same_frame(@96)<br>
same_frame(@104)<br>
same_frame(@112)<br>
same_frame(@120)<br>
same_frame(@128)<br>
<div><br>
</div>
<div>I have shared the related output I get with
-Xlog:exceptions on <a href="https://gist.github.com/sdeleuze/96e638dd3bb94918c545ee54fca9b8a3" moz-do-not-send="true" class="moz-txt-link-freetext">https://gist.github.com/sdeleuze/96e638dd3bb94918c545ee54fca9b8a3</a>
in case that could be useful.</div>
<div><br>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Sep 11, 2024 at
2:51 PM Alan Bateman <<a href="mailto:alan.bateman@oracle.com" moz-do-not-send="true" class="moz-txt-link-freetext">alan.bateman@oracle.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On
11/09/2024 13:16, Sebastien Deleuze wrote:<br>
> Yes, it works without --add-opens and without
-XX:CacheDataStore, in <br>
> all my use cases I never set --add-opens explicitly.<br>
><br>
> There are various fallback paths, and potentially the
original <br>
> exception is hidden, so let me have a deeper look by
comparing broken <br>
> and successful code paths.<br>
> I will share more details in an upcoming email.<br>
><br>
Maybe running with -Xlog:exceptions might reveal something.<br>
<br>
-Alan<br>
</blockquote>
</div>
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