Failing to get a Kerberos ticket for delegation after the server was running for a few hours

Issue

After some time, the Kerberos ticket is not valid anymore and causes the java.lang.NullPointerException

INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION= java.lang.NullPointerException
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.auth.BasicScheme.authenticate(BasicScheme.java:162)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.auth.HttpAuthenticator.doAuth(HttpAuthenticator.java:239)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.auth.HttpAuthenticator.generateAuthResponse(HttpAuthenticator.java:202)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:263)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
[stdout] (default task-393) REQ-TRX= USER= SESSION=     at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
INFO  [stdout] (default task-393) REQ-TRX= USER= SESSION=     at com.example.spnego.SPNegoMethodExecutor.execute(SPNegoMethodExecutor.java:66)