Running executable jar file in windows vista or windows 7

In Windows Vista or Windows 7 the manual file association editor has been removed. So you can have problems with running executable jar by double-clicking it. You can solve it in different ways:

1) Most easiest way is to use program Jarfix

2) Also you can add file association in your command prompt window using "Run as administrator”:

          C:\>assoc .jar=jarfile

          C:\>ftype jarfile="C:\path\to\your\javaw.exe" -jar "%1" %*

Resolving problems with running Apache Nutch on Windows. Part 1.

First root of some problems with running Apache Nutch on Windows is Cygwin, as Nutch has bash scripts to run. So, install Cygwin and add its root directory to 'path' system variable (e.g. C:\Cygwin). But if you added only root directory to path you can see exception in Nutch log:

java.io.IOException: Expecting a line not the end of stream
    at org.apache.hadoop.fs.DF.parseExecResult(DF.java:109)
    at org.apache.hadoop.util.Shell.runCommand(Shell.java:179)
    at org.apache.hadoop.util.Shell.run(Shell.java:134)
    at org.apache.hadoop.fs.DF.getAvailable(DF.java:73)
    at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:329)
    at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:124)
    at org.apache.hadoop.mapred.MapOutputFile.getSpillFileForWrite(MapOutputFile.java:107)
    at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1221)
    at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1129)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:359)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
    at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)

To resolve this you should add Cygwin 'bin' directory to your system path (e.g. C:\Cygwin\bin)