Sending post from ajax to servlet

I have a problem, not always, it happens randomly. Sometimes I send some data, ~200KB , using jquery ajax, but when I received the request it came null, but before I debugged in Chrome and the data seemed ok. I am using Tomcat 8.5, Java 8.201 and Google Chrome on Windows 10. I appreciate a

RE: oracle 12c driver (UNCLASSIFIED)

I think you need to close resultsets, prepared statements and finally close connections If not Oracle will hangout eventually by exceeded cursors or connections. Open connection Open preparedstatements or callable statements Open resultset Do resu