Internal server error in the harvest monitor

The problem occurs in version 7.4.2 but not in 7.4.1.

Searching in the cached crawl log of a running job gives an internal server error.

Steps to reproduce:

• click the ID of a running job in the "All Running Jobs" view
• click "View/Search in cached Crawllog"
• click "Update cache"
• change the filter regex to anything but ".*"
• click "Search"

Result:

500 Internal server error...
java.lang.NoSuchMethodError: java.nio.ByteBuffer.flip()Ljava/nio/ByteBuffer;
 at dk.netarkivet.heritrix3.monitor.SearchResult.update(SearchResult.java:85)

It appears to be caused by compiling the java class with a newer version than the 1.8 target version. The ByteBuffer class in 1.8 doesn't have any flip() method whereas later versions do.

See https://stackoverflow.com/questions/61267495/exception-in-thread-main-java-lang-nosuchmethoderror-java-nio-bytebuffer-flip for discussion and resolution suggestions.