[ http://issues.apache.org/jira/browse/NET-31?page=all ]
Rory Winston closed NET-31. --------------------------- > [net] Freeze during FTP connect > ------------------------------- > > Key: NET-31 > URL: http://issues.apache.org/jira/browse/NET-31 > Project: Commons Net > Issue Type: Bug > Affects Versions: 1.4 Final > Environment: Operating System: Linux > Platform: Other > Reporter: ThomasGt > Fix For: 2.0 > > > 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 -- This message is automatically generated by JIRA. - 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