'java.io.FileNotFoundException: /dev/urandom (EDC5157I An internal error has occurred.)' Received During Tomcat 6.0.29 Startup

Products

• ACF2
• ACF2 - DB2 Option
• ACF2 for zVM
• ACF2 - z/OS
• ACF2 - MISC
• 24X7 High-Availability Manager for DB2 for z/OS
• Batch Processor
• Compile QQF
• Data Compressor for DB2 for z/OS
• CA Unicenter NSM
• RC/Update for DB2 for z/OS
• DB2 TOOLS- DATABASE MISC
• PanApt
• PanAudit
• Top Secret
• Top Secret - LDAP

Issue/Introduction

When bringing up Tomcat 6.0.29, the following messages are received:

Throwable occurred: java.io.FileNotFoundException: /dev/urandom (EDC5157I An internal error has occurred.)
:at java.io.FileInputStream.<init>(FileInputStream.java:112)
:at org.apache.catalina.session.ManagerBase.setRandomFile(ManagerBase.java:533)
:at org.apache.catalina.session.ManagerBase.getRandomBytes(ManagerBase.java:958)
:at org.apache.catalina.session.ManagerBase.init(ManagerBase.java:753)
:at org.apache.catalina.session.StandardManager.start(StandardManager.java:625)

 

Environment

Release:
Component: TSSLDP

Resolution

When using Tomcat 6.0.29, Tomcat tries to get it's random number generator seeded from a hardware source -- ICSF. The device driver gets a read error, if ICSF is not installed/configured on a system. Tomcat then goes to compute the random number generator seed on his own.

This exception will always be thrown by Tomcat now if ICSF is not available, if using 6.0.29 or above.