[NET-710] Timestamp parsing fails around the change to daylight savings

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 3.3, 3.8.0
• Component/s: FTP
• Assignee: Unassigned
• Reporter: Mike Baranczak
• Created: 16/Mar/22 19:13
• Updated: Yesterday 10:28
• Resolved: Yesterday 10:28

Description

String ts = "Mar 13 02:33";
Calendar serverTime = Calendar.getInstance(TimeZone.getTimeZone("EDT"), Locale.US);
serverTime.set(2022, 2, 16, 14, 0);
Calendar c = new FTPTimestampParserImpl().parseTimestamp(ts, serverTime);

 

Result:

 

java.text.ParseException: Timestamp 'Mar 13 02:33' could not be parsed using a server time of Wed Mar 16 10:00:54 EDT 2022
    at org.apache.commons.net.ftp.parser.FTPTimestampParserImpl.parseTimestamp (FTPTimestampParserImpl.java:246)

 

I can't tell what's going on, but this seems to have something to do with the transition to Daylight Savings Time, which happened on Sunday, March 13. I ran into this bug when trying to get a list of recent files from an FTP server.  (UnixFTPEntryParser ignores the exception silently, which isn't a great idea, either.)