Hello Alexey, If jre 1.5.0 does access /dev/random despite otherwise configured, this seems to me a jdk problem.
In http://java.sun.com/j2se/1.5.0/relnotes.html they state that you should use the configuration file. You may experiment with a non-existent file set in this property, as they tell there is a java-only fallback used if the file cannot be read. The softlink is not a good idea because other applications that want /dev/random do now not really get what they want ... Regards Alexander Schröder -----Original Message----- From: Alexey Gaidukov [mailto:[EMAIL PROTECTED] Sent: Dienstag, 17. Januar 2006 02:48 To: Schroeder, Alexander Cc: maxdb@lists.mysql.com Subject: Re: jdbc driver freezes in connect under linux Yesterday I tested jre-1.4.2. In java.security was line securerandom.source=file:/dev/random Now in jre-1.4.2 I can't reproduce the problem. But in jre-1.5.0 line is already securerandom.source=file:/dev/urandom and problem there is. But after the following commands the problem is not reproduceable in jre-1.5.0. rm /dev/random ln -s /dev/urandom /dev/random But I guess it is not good idea. Thanks in advance, Alexey Gaidukov. Schroeder, Alexander пишет: > Hello Alexey, > > there seems to be an issue with the secure random device /dev/random > on Linux if there isn't enough entropy available. It will then block. > > You need to set in $JAVA_HOME/jre/lib/security/java.security the > > securerandom.source=file:/dev/random > > to > > securerandom.source=file:/dev/urandom > > (/dev/urandom is the non-blocking companion of /dev/random). > > Then it should work. > > Regards > Alexander Schröder > SAP DB, SAP Labs Berlin > > > -----Original Message----- > From: Alexey Gaidukov [mailto:[EMAIL PROTECTED] > Sent: Montag, 16. Januar 2006 11:12 > To: maxdb@lists.mysql.com > Subject: jdbc driver freezes in connect under linux > > JDBC 7_6_00_16_4753. MaxDB 7.6.00.16 linux 32 and 64 bit. On client side > linux kernels 2.6.14-1.1653_FC4smp and 2.6.14.4 from kernel.org were > tested. Tested java runtime: jre-1.5.0-6, jre-1.5.0-4 and j2sdk1.4.2_10. > > > When I run the following simple application then this application is > freezed in "getConnection" and will waiting keyboard events. If there is > no keyboard events then waiting can be very long. I'm waiting about half > of hour. If to connect with NetBeans debugger then jre is waiting in > com.sap.dbtech.util.security line 50 ( "while (true)" line). I have this > problem with all programs on linux with JDBC driver - sync manager > message server, sync manager GUI and other. In GUI programs mouse events > can help. In console program only keyboard events can help. If I connect > to linux with scp or telnet then nothing can help and waiting time is > random. > > > package javaapplication3; > import java.sql.*; > public class Main { > static final java.util.Properties connectionInfo = new > java.util.Properties(); > public Main() {} > public static void main(String[] args) { > try { > String driver = "com.sap.dbtech.jdbc.DriverSapDB"; > String url = "jdbc:sapdb://maxdb/DCDB"; > Class.forName(driver); > connectionInfo.put("driver", driver); > connectionInfo.put("url", url); > connectionInfo.put("user", "GIS"); > connectionInfo.put("password", "1"); > Connection connection = DriverManager.getConnection(url, > connectionInfo); > System.out.println("connection:"+connection); > } > catch (Exception e) { > e.printStackTrace(); > } > } > } > > > -- MaxDB Discussion Mailing List For list archives: http://lists.mysql.com/maxdb To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
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