DO NOT REPLY [Bug 38160] New: - Freeze during FTP connect (Commons Net 1-4-0)

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DO NOT REPLY [Bug 38160] New: - Freeze during FTP connect (Commons Net 1-4-0)

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           Summary: Freeze during FTP connect (Commons Net 1-4-0)
           Product: Commons
           Version: 1.4 Final
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Keywords: JDK1.4
          Severity: normal
          Priority: P2
         Component: Net
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Several times a day a Java process open FTP connections (using Commons Net) and
some times (approximately twice a week) the process hang until I kill it.
By looking at the dump it seems the lock appears during the connection opening
but I have no clue why it happens.

Here are the information I have :

-------------------------------
FTP client :
- OS "Red Hat Enterprise Linux ES release 3 (Taroon Update 2)"
- Java j2sdk1.4.2_05

FTP server on windows

-------------------------------

Thread dump get through kill -3 on java process :

Full thread dump Java HotSpot(TM) Client VM (1.4.2_05-b04 mixed mode):

"Thread-1" daemon prio=1 tid=0x081e2cc0 nid=0x72c5 runnable [a926e000..a926e87c]
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:129)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
        - locked <0xaadc0d80> (a java.io.BufferedInputStream)
        at java.io.FilterInputStream.read(FilterInputStream.java:66)
        at java.io.PushbackInputStream.read(PushbackInputStream.java:120)
        at
org.apache.commons.net.io.FromNetASCIIInputStream.__read(FromNetASCIIInputStream.java:75)
        at
org.apache.commons.net.io.FromNetASCIIInputStream.read(FromNetASCIIInputStream.java:170)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
        - locked <0xaadc0028> (a org.apache.commons.net.telnet.TelnetInputStream)
        at
org.apache.commons.net.telnet.TelnetInputStream.__read(TelnetInputStream.java:114)
        at
org.apache.commons.net.telnet.TelnetInputStream.run(TelnetInputStream.java:535)
        at java.lang.Thread.run(Thread.java:534)

"Signal Dispatcher" daemon prio=1 tid=0x0809c440 nid=0x72c5 waiting on condition
[0..0]

"Finalizer" daemon prio=1 tid=0x08097aa0 nid=0x72c5 in Object.wait()
[aabbd000..aabbd87c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xab22b7a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
        - locked <0xab22b7a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

"Reference Handler" daemon prio=1 tid=0x08096ef8 nid=0x72c5 in Object.wait()
[aac3e000..aac3e87c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xab22b810> (a java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Object.java:429)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:115)
        - locked <0xab22b810> (a java.lang.ref.Reference$Lock)

"main" prio=1 tid=0x0805ba20 nid=0x72c5 in Object.wait() [bfff9000..bfff9eec]
        at java.lang.Object.wait(Native Method)
        - waiting on <0xaad40000> (a [I)
        at java.lang.Object.wait(Object.java:429)
        at
org.apache.commons.net.telnet.TelnetInputStream.read(TelnetInputStream.java:339)
        - locked <0xaad40000> (a [I)
        at
org.apache.commons.net.telnet.TelnetInputStream.read(TelnetInputStream.java:466)
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:220)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:277)
        - locked <0xaad42108> (a java.io.BufferedInputStream)
        at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:408)
        at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:450)
        at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:182)
        - locked <0xaad42988> (a java.io.InputStreamReader)
        at java.io.InputStreamReader.read(InputStreamReader.java:167)
        at java.io.BufferedReader.fill(BufferedReader.java:136)
at java.io.BufferedReader.readLine(BufferedReader.java:299)
        - locked <0xaad42988> (a java.io.InputStreamReader)
        at java.io.BufferedReader.readLine(BufferedReader.java:362)
        at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:264)
        at org.apache.commons.net.ftp.FTP._connectAction_(FTP.java:335)
        at org.apache.commons.net.ftp.FTPClient._connectAction_(FTPClient.java:550)
        at org.apache.commons.net.SocketClient.connect(SocketClient.java:163)
        at org.apache.commons.net.SocketClient.connect(SocketClient.java:250)
        at com.cnetchannel.common.ftp.connect(ftp.java:405)
        at com.cnetchannel.dataSource.increment(dataSource.java:137)
        at com.cnetchannel.dataSource.main(dataSource.java:62)

"VM Thread" prio=1 tid=0x08095c98 nid=0x72c5 runnable

"VM Periodic Task Thread" prio=1 tid=0x0809ec70 nid=0x72c5 waiting on condition
"Suspend Checker Thread" prio=1 tid=0x0809bae8 nid=0x72c5 runnable

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DO NOT REPLY [Bug 38160] - [net] Freeze during FTP connect

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http://issues.apache.org/bugzilla/show_bug.cgi?id=38160


[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Freeze during FTP connect   |[net] Freeze during FTP
                   |(Commons Net 1-4-0)         |connect




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DO NOT REPLY [Bug 38160] - [net] Freeze during FTP connect

Bugzilla from bugzilla@apache.org
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------- Additional Comments From [hidden email]  2006-01-07 00:52 -------
Can you please supply relevant snippets of code?

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DO NOT REPLY [Bug 38160] - [net] Freeze during FTP connect

Bugzilla from bugzilla@apache.org
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DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG·
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------- Additional Comments From [hidden email]  2006-11-27 23:17 -------
I have also encountered this issue on Windows with version 1.4.1 and SUN JVM
1.4.2_10. My usage is in the same manner, I reconnect with a new FTPClient
object every time needed and it gets frozen at the connect without further
detail. My dump showed the same source points.
Regards,
Nuri

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DO NOT REPLY [Bug 38160] - [net] Freeze during FTP connect

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG·
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=38160





------- Additional Comments From [hidden email]  2006-11-28 01:42 -------
If you are in a position to test with JDK 5.0, you could try the new snapshot:

http://people.apache.org/~rwinston/commons-net-2.0/commons-net-ftp-2.0.0-SNAPSHOT.jar

Which should fix it. Let me know if you are in a position to test this.


(In reply to comment #2)
> I have also encountered this issue on Windows with version 1.4.1 and SUN JVM
> 1.4.2_10. My usage is in the same manner, I reconnect with a new FTPClient
> object every time needed and it gets frozen at the connect without further
> detail. My dump showed the same source points.
> Regards,
> Nuri



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DO NOT REPLY [Bug 38160] - [net] Freeze during FTP connect

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------- Additional Comments From [hidden email]  2008-01-29 02:20 -------
Hi,

I'm also facing the freeze during a call to connect() on Windows XP with J2SE
5.0:

Thread dump:
at java/lang/Object.wait(Native Method)
at java/lang/Object.wait(Object.java:199(Compiled Code))
at org/apache/commons/net/telnet/TelnetInputStream.read
(TelnetInputStream.java:313(Compiled Code))
at org/apache/commons/net/telnet/TelnetInputStream.read
(TelnetInputStream.java:466(Compiled Code))
at java/io/BufferedInputStream.read1(BufferedInputStream.java:265(Compiled
Code))
at java/io/BufferedInputStream.read(BufferedInputStream.java:324(Compiled
Code))
at java/io/FilterInputStream.read(FilterInputStream.java:113(Compiled Code))
at sun/nio/cs/StreamDecoder$ConverterSD.implRead(StreamDecoder.java:352
(Compiled Code))
at sun/nio/cs/StreamDecoder.read(StreamDecoder.java:250(Compiled Code))
at java/io/InputStreamReader.read(InputStreamReader.java:212(Compiled Code))
at java/io/BufferedReader.fill(BufferedReader.java:157(Compiled Code))
at java/io/BufferedReader.readLine(BufferedReader.java:320(Compiled Code))
at java/io/BufferedReader.readLine(BufferedReader.java:383(Compiled Code))
at org/apache/commons/net/ftp/FTP.__getReply(FTP.java:264(Compiled Code))
at org/apache/commons/net/ftp/FTP._connectAction_(FTP.java:335(Compiled Code))
at org/apache/commons/net/ftp/FTPClient._connectAction_(FTPClient.java:550)
at org/apache/commons/net/SocketClient.connect(SocketClient.java:163)

-------------------------------------------------------------------------------

Could you let us know when Commons Net 2.0 would be officially released?

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DO NOT REPLY [Bug 38160] - [net] Freeze during FTP connect

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------- Additional Comments From [hidden email]  2008-01-29 04:28 -------
Commons issues are now tracked using JIRA:
    http://issues.apache.org/jira/browse/NET

This issue is here:
    https://issues.apache.org/jira/browse/NET-31

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