Please check this similar error below and esp Resolution part from Empower site:
Description:
Original Article Number : 0 : after a disk full problem, we cannot restart an IS the log generated when launching the IS is com.wm.util.coder.InvalidDatatypeException: [ISC.0076.9009] Root element is null at com.wm.util.coder.XMLCoder.decode(XMLCoder.java:280) at com.wm.util.coder.Coder.readFromFile(Coder.java:143) at com.wm.app.b2b.server.PackageManager.getManifest(PackageManager.java:2308) at com.wm.app.b2b.server.PackageManager.getManifest(PackageManager.java:2274) at com.wm.app.b2b.server.PackageManager.getAllManifests(PackageManager.java:2254) at com.wm.app.b2b.server.PackageManager.loadPackages(PackageManager.java:333) at com.wm.app.b2b.server.PackageManager.init(PackageManager.java:255) at com.wm.app.b2b.server.Server.run(Server.java:411) [HR][/HR]Resolution:
After system runned out of disk space, some manifest.v3 files got corrupted. The command “find ./ -name manifest.v3 | xargs ls -l” showed some zero size files. Restoring them with manifest.bak solved the issue.
HTH,
RMG
#webMethods#Integration-Server-and-ESB#webMethods-General