Getting java.io.IOException: Cannot run program "bunyan": error=2, No such file or directory Error...

I am continiously getting below error ever for a hello world program.

I just wrote a simple java class and printing Hello World and i see the below exception coming after the main execution. It is really frustrating when I am trying to execute more complex program and i only see these exceptions and not able to troubleshoot my issues... Pls help.

PS: It started all of a sudden today.. was totally fine before...

using oracle JDK: jdk1.8.0_121.jdk

IDEA.app/Contents/lib/idea_rt.jar" com.intellij.rt.execution.application.AppMain com.americanexpress.travel.services.ldap.service.sample
Hello world
java.io.IOException: Cannot run program "bunyan": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at java.lang.Runtime.exec(Runtime.java:620)
at java.lang.Runtime.exec(Runtime.java:528)
at cyue.idea.plugins.bunyan.PipeProcessing.convert(PipeProcessing.java:48)
at cyue.idea.plugins.bunyan.BunyanFilter.applyFilter(BunyanFilter.java:111)
at com.intellij.execution.filters.CompositeInputFilter$1.applyFilter(CompositeInputFilter.java:70)
at com.intellij.execution.filters.CompositeInputFilter.applyFilter(CompositeInputFilter.java:48)
at com.intellij.execution.impl.ConsoleViewImpl.print(ConsoleViewImpl.java:609)
at com.intellij.execution.impl.ConsoleViewRunningState$1.onTextAvailable(ConsoleViewRunningState.java:43)
at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.execution.process.ProcessHandler$4.invoke(ProcessHandler.java:226)
at com.sun.proxy.$Proxy16.onTextAvailable(Unknown Source)
at com.intellij.execution.process.ProcessHandler.notifyTextAvailable(ProcessHandler.java:200)
at com.intellij.execution.process.ColoredProcessHandler.textAvailable(ColoredProcessHandler.java:96)
at com.intellij.execution.process.ColoredProcessHandler.coloredTextAvailable(ColoredProcessHandler.java:71)
at com.intellij.execution.process.AnsiEscapeDecoder.processTextChunk(AnsiEscapeDecoder.java:179)
at com.intellij.execution.process.AnsiEscapeDecoder.escapeText(AnsiEscapeDecoder.java:76)
at com.intellij.execution.process.ColoredProcessHandler.notifyTextAvailable(ColoredProcessHandler.java:60)
at com.intellij.execution.process.BaseOSProcessHandler$SimpleOutputReader.onTextAvailable(BaseOSProcessHandler.java:290)
at com.intellij.util.io.BaseOutputReader.sendText(BaseOutputReader.java:202)
at com.intellij.util.io.BaseOutputReader.processInput(BaseOutputReader.java:186)
at com.intellij.util.io.BaseOutputReader.readAvailableNonBlocking(BaseOutputReader.java:105)
at com.intellij.util.io.BaseDataReader.readAvailable(BaseDataReader.java:82)
at com.intellij.util.io.BaseDataReader.doRun(BaseDataReader.java:160)
at com.intellij.util.io.BaseDataReader$1.run(BaseDataReader.java:61)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 31 more

Process finished with exit code 0