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http://issues.apache.org/bugzilla/show_bug.cgi?id=31272 TelnetInputStream zombie thread memory leak, FTPClient TelnetClient Summary: TelnetInputStream zombie thread memory leak, FTPClient TelnetClient Product: Commons Version: Nightly Builds Platform: HP OS/Version: HP-UX Status: NEW Severity: Normal Priority: Other Component: Net AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] If myFTPClient.setReaderThread(false) and many ftp clients are instanciated over time, the VM gets out of memory errors. The problem is that the underlying TelnetClient's TelnetInputStream creates a new thread that it never uses (never starts, or joins). The VM is unable to garbage collect these zombie threads. This problem is paticularly notable given that several users have observed hangs doing continual ftp unless setReaderThread(false). This observed on hpux jdk 1.3 <todo lookup specific version> Here's a patch: cvs server: Diffing src/java/org/apache/commons/net/telnet Index: src/java/org/apache/commons/net/telnet/TelnetClient.java =================================================================== RCS file: /home/cvspublic/jakarta- commons/net/src/java/org/apache/commons/net/telnet/TelnetClient.java,v retrieving revision 1.12 diff -r1.12 TelnetClient.java 100,101c100 < < tmp = new TelnetInputStream(input, this); --- > tmp = new TelnetInputStream(input, this, readerThread); Index: src/java/org/apache/commons/net/telnet/TelnetInputStream.java =================================================================== RCS file: /home/cvspublic/jakarta- commons/net/src/java/org/apache/commons/net/telnet/TelnetInputStream.java,v retrieving revision 1.11 diff -r1.11 TelnetInputStream.java 56c56 < TelnetInputStream(InputStream input, TelnetClient client) --- > TelnetInputStream(InputStream input, TelnetClient client, boolean readerThread) 72c72,74 < __thread = new Thread(this); --- > if (readerThread) { > __thread = new Thread(this); > } 76a79 > if (__thread==null) { return; } 498c501 < if (__thread.isAlive()) --- > if (__thread!=null && __thread.isAlive()) --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
