Re: Client hung in code download read

On Sat, Mar 22, 2008 at 11:49:28AM -0700, Robert DiFalco wrote:
> Sometimes if a server is restarted at just the right time during a
> client startup, the client will hang in URLJarFile retrieve. It usually
> requires a manual restart of that client (I think it will timeout itself
> but only after something like 9 hours). Is there a read timeout I need
> to be setting somewhere? We've tried several read time out settings in
> different places to no avail. Anyone encountered this one before? Here's
> a thread dump of where the client hangs.
> 
> BootstrapLauncher" prio=1 tid=0x083ba180 nid=0x7773 runnable
> [bd7fd000..bd7ff8cc]
> at java.net.SocketInputStream.socketRead0(Native Method)
> at java.net.SocketInputStream.read(SocketInputStream.java:129)
> at java.io.BufferedInputStream.read1(BufferedInputStream.java:220)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:277)
> - locked <0x449e2cf8> (a java.io.BufferedInputStream)
> at sun.net.www.MeteredStream.read(MeteredStream.java:106)
> - locked <0x449e3aa8> (a sun.net.www.http.KeepAliveStream)
> at java.io.FilterInputStream.read(FilterInputStream.java:111)
> at java.io.FilterInputStream.read(FilterInputStream.java:90)
> at sun.net.www.protocol.jar.URLJarFile$1.run(URLJarFile.java:173)
> at java.security.AccessController.doPrivileged(Native Method)
> at sun.net.www.protocol.jar.URLJarFile.retrieve(URLJarFile.java:164)
> at sun.net.www.protocol.jar.URLJarFile.getJarFile(URLJarFile.java:42)

Assuming Sun's 1.4 or later, have you tried setting the

    sun.net.client.defaultReadTimeout

system property?  See:

    http://java.sun.com/javase/6/docs/technotes/guides/net/properties.html

Note that this will affect all URLConnections that don't otherwise
have read timeouts set (like by URLConnection.setReadTimeout in 5.0
and later).

-- Peter

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