ClassNotFoundException: org.apache.pdfbox.pdmodel.PDDocument

Question

I am getting below error during compilation. I am using Eclipse IDE & working on Ubuntu. I have added the following jar files in the build path 1) pdfbox 1.8.13 & All its dependencies 2) Commons-logging-1.2 .

Please let me know why there is error when the class is in the jar file ?

Error: java.lang.ClassNotFoundException: org.apache.pdfbox.pdmodel.PDDocument
at java.net.URLClassLoader$1.run(URLClassLoader.java:359)
at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:312)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at com.hadoopexpert.PdfRecordReader.initialize(PdfRecordReader.java:41)
at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:521)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:364)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:421)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.mapred.Child.main(Child.java:249)

Unrelated to the problem - if you're just starting with PDFBox, then use 2.0.8 and not the 1.8 versions. — Tilman Hausherr
– Tilman Hausherr, Commented Nov 17, 2017 at 13:38

jose · Accepted Answer · 2017-11-21 05:24:38Z

1

My query was resolved by doing following changes

1) Place the jar file of pdfbox in hadoop lib folder too.(make library jar available to hadoop at runtime).

2) Restart hadoop cluster.

Or

1) Make sure that your pdfbox library is available to hadoop by placing it in distributed cache.

https://stackoverflow.com/a/34179783/8956991

answered Nov 21, 2017 at 5:24

jose

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Piotr Wilkin · Accepted Answer · 2017-11-17 11:17:11Z

0

You have the class on the build path, so it compiles, but apparently you don't have it in the classpath of the running binary, which is why it doesn't run. Make sure that your application's classpath includes all the JARs that you have added (or use some build system such as Maven or Gradle which automates that for you).

answered Nov 17, 2017 at 11:17

Piotr Wilkin

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2 Comments

jose Over a year ago

Thanks for the information. I am using Eclipse IDE & have the jars in java build path of particular project. Can you guide me if there is anything else i need to do

Tilman Hausherr Over a year ago

As Piotr wrote "... but apparently you don't have it in the classpath of the running binary". I don't use eclipse myself, but I've often heard that what builds doesn't run. see stackoverflow.com/questions/10383226/… stackoverflow.com/questions/2520821/… stackoverflow.com/questions/9282440/…

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