[VFS-679] NullPointerException in FtpFileObject.doGetLastModifiedTime()

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Nightly Builds, 2.2
• Fix Version/s: 2.3
• Assignee: Unassigned
• Reporter: Boris Petrov
• Created: 07/Nov/18 09:27
• Updated: 20/Nov/18 21:31
• Resolved: 20/Nov/18 21:31

Description

This is similar to https://issues.apache.org/jira/browse/VFS-294 but it is very old so I'm not sure how relevant it is.

We're getting numerous exceptions like:

org.apache.commons.vfs2.FileSystemException: Could not determine the size of file "ftp://ftp.pbteu.com/VMRType.reg".
 at org.apache.commons.vfs2.provider.DefaultFileContent.getSize(DefaultFileContent.java:134)
 ...
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
 at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.NullPointerException: null
 at org.apache.commons.vfs2.provider.ftp.FtpFileObject.doGetContentSize(FtpFileObject.java:449)
 at org.apache.commons.vfs2.provider.DefaultFileContent.getSize(DefaultFileContent.java:132)
 ... 13 common frames omitted

 

And:

 

10:21:15.427 [Thread-20] ERROR o.a.c.vfs2.impl.DefaultFileMonitor - Could not determine the last modified timestamp of "ftp://ftp.pbteu.com/VMRType.reg".
org.apache.commons.vfs2.FileSystemException: Could not determine the last modified timestamp of "ftp://ftp.pbteu.com/VMRType.reg".
 at org.apache.commons.vfs2.provider.DefaultFileContent.getLastModifiedTime(DefaultFileContent.java:156)
 at org.apache.commons.vfs2.impl.DefaultFileMonitor$FileMonitorAgent.check(DefaultFileMonitor.java:526)
 at org.apache.commons.vfs2.impl.DefaultFileMonitor$FileMonitorAgent.access$200(DefaultFileMonitor.java:367)
 at org.apache.commons.vfs2.impl.DefaultFileMonitor.run(DefaultFileMonitor.java:330)
 at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.NullPointerException: null
 at org.apache.commons.vfs2.provider.ftp.FtpFileObject.doGetLastModifiedTime(FtpFileObject.java:469)
 at org.apache.commons.vfs2.provider.DefaultFileContent.getLastModifiedTime(DefaultFileContent.java:154)
 ... 4 common frames omitted

 

This is happening on 2.2 and on the current trunk. I'm not sure where to start digging from but this is a show-stopper for us. Any help is appreciated!