question Re: How to estimate the Optimal Java Heap Size for Navigator Metadata Server when there is no nav_elements nor nav

question Re: How to estimate the Optimal Java Heap Size for Navigator Metadata Server when there is no nav_elements nor nav_relations? in Support Questions https://community.cloudera.com/t5/Support-Questions/How-to-estimate-the-Optimal-Java-Heap-Size-for-Navigator/m-p/300913#M220433 Hello <a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/19969">@md186036</a> , The error message you pointed out [1] seems to be a known issue and is looked at by the below internal JIRA ticket: NAV-7272 - NPE in getEpIdentitiesForMissingRelationsAs per the JIRA ticket: "An NPE is being caused by getEpIdentitiesForMissingRelations() during Spark extraction. The condition that causes it is rare, however, once the condition exists, because of the NPE, it will continue forever. The code is trying to detect ep2Ids for linked relations that are missing so they can be added. However, the code fails to check for null in the case that this is true." The fix is not available yet in any currently released CDH distribution. The fix might be available in CDH6.4.0, 5.16.3, 6.2.2, 6.3.4, 7.1.1, 5.17.0. My understanding is that this can cause no new metadata is produced. Should you have a Cloudera Support Subscription, please kindly file a support ticket with us to assist you further, as there is no workaround identified for this bug. Thank you: Ferenc [1] <PRE>ERROR SparkPushExtractor [qtp1810923540-17908]: com.cloudera.nav.pushextractor.spark.SparkPushExtractor Error extracting Spark operation. java.lang.NullPointerExceptio</PRE>  Wed, 05 Aug 2020 12:38:11 GMT Bender 2020-08-05T12:38:11Z