https://community.cloudera.com/t5/Support-Questions/How-to-estimate-the-Optimal-Java-Heap-Size-for-Navigator/m-p/300889#M220422 <P>Hi&nbsp;<a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/12296">@Bender</a>&nbsp;,<BR /><BR />I do have entries with INFO in the log file but I can't find any with nav_elements. I also have some errors and warnings:&nbsp;<BR /><BR /></P><LI-CODE lang="markup">ERROR SparkPushExtractor [qtp1810923540-17908]: com.cloudera.nav.pushextractor.spark.SparkPushExtractor Error extracting Spark operation. java.lang.NullPointerException WARN ApiExceptionMapper [qtp1810923540-17908]: Unexpected exception. java.lang.NullPointerException ERROR SparkPushExtractor [qtp1810923540-17879]: com.cloudera.nav.pushextractor.spark.SparkPushExtractor Error extracting Spark operation. org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException: Expected mime type application/octet-stream but got application/xml. &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;response&gt; &lt;lst name="error"&gt;&lt;str name="msg"&gt;application/x-www-form-urlencoded content length (3820497 bytes) exceeds upload limit of 2048 KB&lt;/str&gt;&lt;int name="code"&gt;400&lt;/int&gt;&lt;/lst&gt; &lt;/response&gt;</LI-CODE><P>&nbsp;</P><P>I restarted Cloudera Management Server on July 29th.&nbsp;<BR /><BR />Thanks,&nbsp;<BR />Daniel</P> Tue, 04 Aug 2020 19:33:56 GMT md186036 2020-08-04T19:33:56Z