NullPointerException if in ftp-directory are files with creation date Feb 29 current year (Problem of leap year)

• Key: NET-224
• Type: Bug
• Status: Closed
• Resolution: Fixed
• Priority: Major
• Assignee: Unassigned
• Reporter: Alexander
• Affects Version/s: 1.4
• Fix Version/s: 2.0, 1.5

Description

1) Ant code:

<ftp action="get"
server="${ftp.server}"
userid="${ftp.user}"
password="${ftp.password}"
remotedir="${ftp.dir}"
verbose="yes"
depends="yes">
<fileset dir="${lib}">
<include name="*.jar"/>
</fileset>
</ftp>

NullPointerException if in ${ftp.dir} are files with creation date Feb 29 current year

2) Caused:
Incorrect parse creation date Feb 29 current year

For java 1.5/1.6:
Example 1:
SimpleDateFormat sdf = new SimpleDateFormat("MMM d yy");
sdf.setLenient(false);
System.out.println("date=" + sdf.parse("Feb 29 12:14"));

Result:
date=null;

If doesn't use command sdf.setLenient(false) then result: date = Sun Mar 01 12:14:00 EET 1970

For java 1.4:
Result always "date=Sun Mar 01 12:14:00 EET 1970", because for java 1.4 doesn't throw error NullPointerException

3) Sources:

File: commons-net-1.4.1\src\java\org\apache\commons\net\ftp\parser\FTPTimestampParserImpl.java

Caused in function (line 225: this.recentDateFormat.setLenient(false); ):

public void configure(FTPClientConfig config) {
....

String recentFormatString = config.getRecentDateFormatStr();
if (recentFormatString == null) { this.recentDateFormat = null; } else { this.recentDateFormat = new SimpleDateFormat(recentFormatString, dfs); this.recentDateFormat.setLenient(false); }
....
}

4) StackTrace:

java.lang.NullPointerException
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:115)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:698)
at org.apache.tools.ant.Main.startAnt(Main.java:199)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.lang.NullPointerException
at org.apache.tools.ant.taskdefs.optional.net.FTP$FTPDirectoryScanner.checkRemoteSensitivity(FTP.java:583)
at org.apache.tools.ant.taskdefs.optional.net.FTP$FTPDirectoryScanner.forceRemoteSensitivityCheck(FTP.java:552)
at org.apache.tools.ant.taskdefs.optional.net.FTP$FTPDirectoryScanner.scan(FTP.java:231)
at org.apache.tools.ant.taskdefs.optional.net.FTP.transferFiles(FTP.java:1570)
at org.apache.tools.ant.taskdefs.optional.net.FTP.transferFiles(FTP.java:1683)
at org.apache.tools.ant.taskdefs.optional.net.FTP.execute(FTP.java:2373)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
... 11 more
— Nested Exception —
java.lang.NullPointerException
at org.apache.tools.ant.taskdefs.optional.net.FTP$FTPDirectoryScanner.checkRemoteSensitivity(FTP.java:583)
at org.apache.tools.ant.taskdefs.optional.net.FTP$FTPDirectoryScanner.forceRemoteSensitivityCheck(FTP.java:552)
at org.apache.tools.ant.taskdefs.optional.net.FTP$FTPDirectoryScanner.scan(FTP.java:231)
at org.apache.tools.ant.taskdefs.optional.net.FTP.transferFiles(FTP.java:1570)
at org.apache.tools.ant.taskdefs.optional.net.FTP.transferFiles(FTP.java:1683)
at org.apache.tools.ant.taskdefs.optional.net.FTP.execute(FTP.java:2373)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:698)
at org.apache.tools.ant.Main.startAnt(Main.java:199)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)