16:56:29.548 [ERROR] testHistoryServerIntegration[Flink version less than 1.4: false](org.apache.flink.runtime.webmonitor.history.HistoryServerTest) Time elapsed: 0.69 s <<< ERROR!
org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.exc.InvalidDefinitionException:
Cannot construct instance of `org.apache.flink.runtime.messages.webmonitor.MultipleJobsDetails`, problem: `java.lang.NullPointerException`
at [Source: (String)"{"errors":["File not found."]}"; line: 1, column: 30]
at org.apache.flink.runtime.webmonitor.history.HistoryServerTest.testHistoryServerIntegration(HistoryServerTest.java:142)
Caused by: java.lang.NullPointerException
at org.apache.flink.runtime.webmonitor.history.HistoryServerTest.testHistoryServerIntegration(HistoryServerTest.java:142)