On Sep 13, 2009, at 2:02 PM, Juergen Weber wrote:
Hi,
my startup hangs 180s at 37%
2.2-SNAPSHOT
Build 2009.09.10-08:12:53.147-0400
Ubuntu 9.0.4 in VMWare Player
I took this thread dump:
[************** ] 37% 43s Starting
org.apache.ger...2009-09-13 19:56:32
<snip>
"main" prio=10 tid=0x08eab800 nid=0x10ab runnable [0xb7576000]
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
$RandomIO.implGenerateSeed(NativePRNG.java:202)
- locked <0xad931778> (a java.lang.Object)
at
sun.security.provider.NativePRNG$RandomIO.access$300(NativePRNG.java:
108)
at
sun.security.provider.NativePRNG.engineGenerateSeed(NativePRNG.java:
102)
at java.security.SecureRandom.generateSeed(SecureRandom.java:
495)
at
com
.sun
.net.ssl.internal.pkcs12.PKCS12KeyStore.getSalt(PKCS12KeyStore.java:
477)
at
com
.sun
.net
.ssl.internal.pkcs12.PKCS12KeyStore.calculateMac(PKCS12KeyStore.java:
834)
at
com
.sun
.net
.ssl.internal.pkcs12.PKCS12KeyStore.engineStore(PKCS12KeyStore.java:
788)
- locked <0xad5a0740> (a
com.sun.net.ssl.internal.pkcs12.PKCS12KeyStore)
at java.security.KeyStore.store(KeyStore.java:1117)
at
org.apache.geronimo.crypto.KeystoreUtil.<clinit>(KeystoreUtil.java:
101)
at
org
.apache
.geronimo
.tomcat
.TomcatManagerImpl.addSslConnectorAttributes(TomcatManagerImpl.java:
459)
at
org
.apache
.geronimo.tomcat.TomcatManagerImpl.<clinit>(TomcatManagerImpl.java:
112)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
<snip>
Hi Jurgen,
Your system is running low on entropy. The main thread is trying to
generate a random number and is reading from /dev/random to generate a
seed value. However, there's not enough external events for the system
to generate "random" data for /dev/random.
There's some discussion, here --
http://www.nabble.com/Startup-time-delay-in-Ubuntu-server-td21301711s134.html
Using /dev/urandom is likely to be your best bet, though it may affect
the quality (i.e. randomness) of your random number. I'm not an
expert. So, don't know how concerned you should be...
You may find these useful:
http://n0tablog.wordpress.com/2007/11/24/running-out-of-entropy-in-debian-etch/
http://whatan00b.com/slow-apache-starts-on-ubuntu
http://en.wikipedia.org/wiki/Urandom
--kevan
--kevan
