Nightly snapshot failures - :sdks:java:io:kudu:compileJava

It looks like the checker itself is failing? But I'm no java expert, and don't understand. It was passing earlier in the day.

:sdks:java:io:kudu:compileJava

error: SourceChecker.typeProcess: unexpected Throwable (CompletionFailure) while processing /home/rebo/git/src/github.com/apache/beam/sdks/java/io/kudu/src/main/java/org/apache/beam/sdk/io/kudu/KuduIO.java; message: class file for org.apache.yetus.audience.InterfaceAudience$Private not found
; The Checker Framework crashed. Please report the crash.
Compilation unit: /home/rebo/git/src/github.com/apache/beam/sdks/java/io/kudu/src/main/java/org/apache/beam/sdk/io/kudu/KuduIO.java
Last visited tree at line 123 column 1:
@experimental(Kind.SOURCE_SINK)
Exception: com.sun.tools.javac.code.Symbol$CompletionFailure: class file for org.apache.yetus.audience.InterfaceAudience$Private not found; com.sun.tools.javac.code.Symbol$CompletionFailure: class file for org.apache.yetus.audience.InterfaceAudience$Private not found
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error