"/dev/random" hangs in java program when server is inactive
Issue
- Reading "
/dev/random" hangs in java program - entropy is too low to generate enough random numbers
-
Java program hangs as it's waiting on a thread that's continuously in this state trying to generate random numbers:
"main" prio=10 tid=0x00002aab580e2000 nid=0x6c98 runnable [0x000000004044f000] java.lang.Thread.State: RUNNABLE at java.io.FileInputStream.readBytes(Native Method) at java.io.FileInputStream.read(FileInputStream.java:199) at sun.security.provider.NativePRNG$RandomIO.readFully(NativePRNG.java:185) at sun.security.provider.NativePRNG$RandomIO.implGenerateSeed(NativePRNG.java:202) - locked <0x00002aaad23739a0> (a java.lang.Object) at sun.security.provider.NativePRNG$RandomIO.access$300(NativePRNG.java:108) at sun.security.provider.NativePRNG.engineGenerateSeed(NativePRNG.java:102) at java.security.SecureRandom.generateSeed(SecureRandom.java:495)
Environment
- Red Hat Enterprise Linux 5 - All architectures
- Red Hat Enterprise Linux 6 - All architectures
- Java application
- JBoss Enterprise Application Platform (EAP)
- Tomcat
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