Jar manifest error – java.io.IOException: invalid header field

Often times, this error is causing by the mismatch order between “m” and “f” Jar options.

For example,

jar -cvfm manifest.txt example.jar com/mkyong/awt/*.class

The above command will causing the following error :

java.io.IOException: invalid header field
	at java.util.jar.Attributes.read(Attributes.java:406)
	at java.util.jar.Manifest.read(Manifest.java:199)
	at java.util.jar.Manifest.<init>(Manifest.java:69)
	at sun.tools.jar.Main.run(Main.java:150)
	at sun.tools.jar.Main.main(Main.java:1044)

Did you spot the error? The “m” and “manifest” is not match, the system is consider your manifest file as “example.jar” :)

The letters “m” and “f” must appear in the same order that “manifest” and “jarfile” appear.

The working command should be

jar -cvmf manifest.txt example.jar com/mkyong/awt/*.class

Please read this article about the correct way to add manifest into your Jar file.

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About the Author

mkyong
Founder of Mkyong.com and HostingCompass.com, love Java and open source stuff. Follow him on Twitter, or befriend him on Facebook or Google Plus. If you like my tutorials, consider make a donation to these charities.

Comments

  • Ahmed

    Hallo Sir,

    I still have the same problem.

    a:HelloWorld ahmed$ jar -cvfm HelloWorld.jar Manifest.txt HelloWorld.class
    java.io.IOException: invalid header field
    at java.util.jar.Attributes.read(Attributes.java:406)
    at java.util.jar.Manifest.read(Manifest.java:199)
    at java.util.jar.Manifest.(Manifest.java:69)
    at sun.tools.jar.Main.run(Main.java:172)
    at sun.tools.jar.Main.main(Main.java:1177)

    • Ahmed

      I fixed it! :)

      I was using the Mac program “TextEdit” and that’s why i had the error..

      TextWrangler fixed the problem! :D

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