A DESCRIPTION OF THE PROBLEM :
We are seeing occasional class-loading errors where the class name is incorrect. However runs of the same code on the same machine work fine both before and after so there is not class file corruption. We have been seeing similar issues for a while but assumed it was JDK-8282535. However it is still occurring on 17.0.7 so either it is a different bug or JDK-8282535 wasn't fixed.

We see the error in CI about once a week. We don't really have the resources to try and get a smaller reproduction due to how rarely it occurs.

Failed to instantiate SLF4J LoggerFactory
Reported exception:
java.lang.NoClassDefFoundError: java/util/concconcconScheduledExecutorService
at org.slf4j.impl.StaticLoggerBinder.<init>(StaticLoggerBinder.java:59)
at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:50)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:417)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:362)
(private stack frames elided here)
Caused by: java.lang.ClassNotFoundException: java.util.concconcconScheduledExecutorService
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
... 13 more

Another case:

2023-06-21T22:24:49.2787520Z Caused by: java.lang.ClassNotFoundException: javajavajavajavaja
2023-06-21T22:24:49.2891960Z at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
2023-06-21T22:24:49.2990310Z at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
2023-06-21T22:24:49.3092380Z at java.base/java.lang.ClassLoader.loadClass(Unknown Source)



FREQUENCY : rarely