Zip file is not closed properly #1547
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For checking the contents of an EPUB, a
java.util.zip.ZipFile-object is created. This opens the file for introspection. The file can be closed in two different ways: By explicitly being closed once epubcheck is done with it (calling the.close()method), which is not done in this case; or by waiting for the garbage collection to clean up the object which results in a close as well. The latter is what happens in epubcheck. However there is no guarantee when Java runs the garbage collection, it could after hours. If epubcheck is integrated into another long running process, this can block EPUB file for quite a long time – during which it can not be deleted or overwritten.I have implemented a fix for this, storing the ZipFile in the state object and closing it once all checks have been performed. The ZipFile object is still required to be open for checking all the resources during the process so it cannot just be closed at the end of the
checkContainerStructure(···)method.A merge would be greatly appreciated.