PWC6345: There is an error in invoking javac. A full JDK (not just JRE) is required

"org.apache.jasper.JasperException: PWC6345: There is an error in invoking javac.  A full JDK (not just JRE) is required"

If you receive this error please know that your web Server requires JDK instead of JRE version. 

 I faced this in jetty application.

 Below is the solution for Jetty:

Solution:

1. Go to "start.d"  folder.

2. Open "jsp.ini" file.

3. Uncomment the below yellow highlighted  line.

# JSP Configuration

# To use an non-jdk compiler for JSP compilation uncomment next line

 -Dorg.apache.jasper.compiler.disablejsr199=true


Some how if it comes on Other servers , better you check the java path  ref in that server configuration.
Or
Uninstall all java version and install jdk .

Fatal signal 11 (SIGSEGV)

Fatal signal 11 (SIGSEGV)

I faced the same  issue with Bluetooth Socket /Channel close.

After this android app is closing .

Solution Worked for me:

We are trying to close  channel couple of times until it closes properly.

How to find the Duplicate Records in SQL

TO find out the duplicate records in SQL ,

How to find duplicate records:

select field1,field2,field3, count(*)
  from table_name
  group by field1,field2,field3
  having count(*) > 1

How to Delete duplicate Records:

JSON to XML and XML to JSON in JAVA

Best So far for JSON and XML conversions:

As we all know that  now a days we are some how touches the JSON for webapps or standalone applications.

I have requirement where people are asking for JSON to Object and Object to JSON. For this we have lot more easy ways to convert . But for the JSON to XML and vice-versa, we don’t have much options with attribute and XML standards  support.

I found some solutions which need 5-6 jar dependencies and some attribute problems. And XML standard problems. I also fed up with weird tags like  "<e" . Tried and invested couple of hours for better solution and came up with this below one.

This is very simple and easy to understand , for quick reference please check the ref URL .

Finally I am very much satisfied with simple solution like "Staxon".

Very soon I will provide the working example Which I used .

StAXON - JSON via StAX

StAXON lets you read and write JSON using the Java Streaming API for XML (javax.xml.stream). StAXON acts as a door opener for JSON to powerful XML related technologies like

• XSL transformations (XSLT)

• XML binding API (JAXB)
• XML Schema Definition (XSD)
• XPath, XQuery, ...

Features

• Support for JAXB and JAX-RS

• Trigger JSON arrays via XML processing instruction
• Full XML namespace support
• Support the JSON Processing API (JSR-353), Jackson and Gson as JSON streaming backends

• Memory efficient, even for very large documents

• It's pretty fast (benchmark)...

Documentation

Check the Getting Started guide first. More documentation is available from the StAXON Wiki.

Downloads

The Downloads page provides Maven instructions and individual download links.