[Bug] org.apache.paimon.mergetree.compact.PartialUpdateMergeFunctionTest#testMultiSequenceFields unit test failed

### Search before asking

- [x] I searched in the [issues](https://github.com/apache/paimon/issues) and found nothing similar.

### Paimon version

1.2.0

### Compute Engine

flink

### Minimal reproduce step

org.apache.paimon.mergetree.compact.PartialUpdateMergeFunctionTest#testMultiSequenceFields unit test failed

can not run unit test in idea

java.lang.RuntimeException: Could not instantiate generated class 'interface org.apache.paimon.codegen.RecordComparator'

at org.apache.paimon.codegen.CodeGenUtils.generate(CodeGenUtils.java:115)
at org.apache.paimon.codegen.CodeGenUtils.newRecordComparator(CodeGenUtils.java:79)
at org.apache.paimon.utils.UserDefinedSeqComparator.create(UserDefinedSeqComparator.java:79)
at org.apache.paimon.mergetree.compact.PartialUpdateMergeFunction$Factory.lambda$new$1(PartialUpdateMergeFunction.java:425)
at org.apache.paimon.mergetree.compact.PartialUpdateMergeFunction$Factory.lambda$create$7(PartialUpdateMergeFunction.java:561)
at java.util.HashMap.forEach(HashMap.java:1290)
at org.apache.paimon.mergetree.compact.PartialUpdateMergeFunction$Factory.create(PartialUpdateMergeFunction.java:560)
at org.apache.paimon.mergetree.compact.MergeFunctionFactory.create(MergeFunctionFactory.java:30)
at org.apache.paimon.mergetree.compact.PartialUpdateMergeFunctionTest.testMultiSequenceFields(PartialUpdateMergeFunctionTest.java:154)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:214)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:210)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:66)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at java.util.ArrayList.forEach(ArrayList.java:1259)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at java.util.ArrayList.forEach(ArrayList.java:1259)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)
at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)
at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:66)
at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:231)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55)
Caused by: org.apache.paimon.shade.guava30.com.google.common.util.concurrent.UncheckedExecutionException: java.lang.NullPointerException
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2051)
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache.get(LocalCache.java:3962)
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4859)
at org.apache.paimon.codegen.CodeGenUtils.generate(CodeGenUtils.java:110)
... 77 more
Caused by: java.lang.NullPointerException
at sun.net.util.URLUtil.urlNoFragString(URLUtil.java:50)
at sun.misc.URLClassPath.getLoader(URLClassPath.java:523)
at sun.misc.URLClassPath.getNextLoader(URLClassPath.java:495)
at sun.misc.URLClassPath.access$100(URLClassPath.java:67)
at sun.misc.URLClassPath$1.next(URLClassPath.java:277)
at sun.misc.URLClassPath$1.hasMoreElements(URLClassPath.java:288)
at java.net.URLClassLoader$3$1.run(URLClassLoader.java:609)
at java.net.URLClassLoader$3$1.run(URLClassLoader.java:607)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader$3.next(URLClassLoader.java:606)
at java.net.URLClassLoader$3.hasMoreElements(URLClassLoader.java:631)
at sun.misc.CompoundEnumeration.next(CompoundEnumeration.java:45)
at sun.misc.CompoundEnumeration.hasMoreElements(CompoundEnumeration.java:54)
at java.util.ServiceLoader$LazyIterator.hasNextService(ServiceLoader.java:354)
at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:393)
at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:474)
at java.util.Iterator.forEachRemaining(Iterator.java:115)
at org.apache.paimon.plugin.PluginLoader.discover(PluginLoader.java:73)
at org.apache.paimon.codegen.CodeGenLoader.getCodeGenerator(CodeGenLoader.java:41)
at org.apache.paimon.codegen.CodeGenUtils.lambda$newRecordComparator$3(CodeGenUtils.java:84)
at org.apache.paimon.codegen.CodeGenUtils.generateClass(CodeGenUtils.java:127)
at org.apache.paimon.codegen.CodeGenUtils.lambda$generate$5(CodeGenUtils.java:110)
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4864)
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3529)
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2278)
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2155)
at org.apache.paimon.shade.guava30.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2045)
... 80 more

### What doesn't meet your expectations?

unit test failed in idea

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start by running org.apache.paimon.mergetree.compact.PartialUpdateMergeFunctionTest#testMultiSequenceFields and trace the failure through CodeGenUtils, UserDefinedSeqComparator, CodeGenLoader, and PluginLoader. Investigate the reported ServiceLoader and URLClassLoader path, then verify that the test runs successfully in IntelliJ without the generated RecordComparator exception.

Written by the indexing model from the issue text.