SeleniumException & UnreachableBrowserException Problem

[Praveen Kumar]

For last 2-3 months, suddenly all members of Regression Team in my project are getting below exceptions on Eclipse while executing the automated scripts locally:

Exception 1:
org.openqa.selenium.remote.UnreachableBrowserException: Error communicating with the remote browser. It may have died.
Build info: version: '2.31.0', revision: '1bd294d', time: '2013-02-27 20:52:59'
System info: os.name: 'Windows 10', os.arch: 'amd64', os.version: '6.2', java.version: '1.6.0_45'

Exception 2:
com.thoughtworks.selenium.SeleniumException: Error communicating with the remote browser. It may have died.
Build info: version: '2.31.0', revision: '1bd294d', time: '2013-02-27 20:52:59'
System info: os.name: 'Windows 10', os.arch: 'amd64', os.version: '6.2', java.version: '1.6.0_45'

Current Configuration: (Using from Nov, 2014)
OS: Windows 10, JDK: 1.6.45, JRE: 1.6.45, Selenium: 2.31.0, Mozila Firefox: 22

I am very often facing this issue while executing Test cases using Junit Test Suite, but it fails in between somewhere and throws the above mentioned exceptions. This problem started to occur at some point and almost every time when I execute my test scripts (only sometimes it executes end to end test script without this problem).

We have Upgraded our current configuration with the latest: 
OS: Windows 10, JDK: 1.8.151, JRE: 1.8.151, Selenium: 2.53.0, Mozila Firefox: 45.0.2

But still can’t get it to work.

Note :
1: This problem is only encountered on Eclipse and not while executing on Jenkins. Even our workspace is completely up-to-date and both Eclipse and Jenkins are using the same workspace.
2: Unfortunately I can't figure out what we do wrong: we haven't changed anything of the way we use Selenium in our code base recently.

I really need you people expertise and skills to help us solve this issue. This would really helpful for our team. Eagerly looking forward to any suggestions. A solution would be even better. 😊