We have to configure hibernate, if we require the application to create the table when it doesn't already exists. Else, we would end up with the below mentioned exception.

ERROR: ERROR: relation "mytable" does not exist
  Position: 13
org.hibernate.exception.SQLGrammarException: could not execute statement
    at org.hibernate.exception …

IMDB top 250 movies visualized with d3js

While trying Cloudera CDH quickstart VM in my Windows 7 machine, I was facing issues to start it with VMware player.

I was getting the following error message.

The import failed because D:\VirtualMachines\cloudera-quickstart-vm-4.3.0-vmware\cloudera-quickstart-vm-4.3.0-vmware.ovf did not pass OVF specification conformance …

Last week I've attended a Django Session in PyCon India 2013 presented by Arun Ravindran. It was a good session which covered the basics. I started learning Django by doing a considerably big application, and now I'm uncovering the basics step by step. In certain cases I required a very …

A simple getting started sample for ZeroMQ in Python. We will implement a Echo Server and Echo Client.

echo_server.py

import zmq

context = zmq.Context()
socket = context.socket(zmq.REP)
socket.bind("tcp://127.0.0.1:5000")

while True:
    msg = socket.recv()
    print "Got", msg
    socket.send(msg)

echo_client …

I came across an interesting maths tip, which I couldn't resist sharing.

Turning a fraction to a decimal is a childs' play, with a simple division. The trick is on restoring the fraction back from the decimal that has a repeating numbers.

Let us take a decimal "0.4545454545..."

Pick …

Better not to ask feedback, if you don't respect it.

It is the feedback which managers' ask the team. Feedback about work, people, environment and organization. Getting feedback from people generally motivates, as it makes people feel better that they are being heard.

Though it is mandatory for the …

With s3cmd to get files from S3 to EC2 I was getting this error "The difference between the request time and the current time is too large" and the command got terminated.

Found out that the time on EC2 instance was laging too much and wondered about the cause of …

While developing a module that requires to send emails, using actual email servers would be an overhead. They might introduce network latency, possible spam filtering etc. All end up retarding productivity.

We have smtpd.DebuggingServer that could be used as a local email server. All emails that are sent to …

While writing query using hibernate, I always tend to query based on table name and end up getting QuerySyntaxException

org.hibernate.hql.internal.ast.QuerySyntaxException: foo is not mapped [from foo]
    at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:180)
    at org.hibernate.hql.internal.ast.tree …