Issue 1：(Weblogic 8.1_SP5)
weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[ invalid assignment from 'Object' to 'Object' ]
Solution:
Use the "-Xint" option to the JVM. This appears to be an issue with the optimization in the Sun JVM 1.4.x versions.
Alternatively create a .hotspot_compiler file in the working directory of your domain with the content below:
exclude weblogic/utils/classfile/expr/LocalVariableExpression codeAssign
exclude weblogic/utils/classfile/expr/AssignStatement <init>
There is another option and that is to try JRockit JVM
Issue 2:(Weblogic 10.3)
<Server subsystem failed. Reason: java.lang.NumberFormatException: null>
Solution:
Remove: YOUR_DOMAIN/servers/YOUR_ADMIN_SERVER/data/ldap/conf/replicas.prop
Issue 3:(Weblogic 8.1_SP5)
Security exception
Solution:
1) java -cp /opt/bea/8.1_SP5/weblogic81/server/lib/weblogic.jar weblogic.security.utils.AdminAccount weblogic weblogic ./
2) cd YOUR_DOMAIN/YOUR_ADMIN_SERVER/ldap
rm DefaultAuthenticatormyrealmInit.initialized
3) cp ../../DefaultAuthenticatorInit.ldift .
4) rm ../../boot.properties
5) cd ../..
6) add -Dweblogic.management.username=weblogic -Dweblogic.management.password=weblogic to your start scripts
Skill 1:
Find files in a jar package:
for i in `ls`; do jar tf $i | grep "KEY_WORD" && echo $i; done
Skill 2:
Clean old logs:
find . -name "*.log" -mtime +1 -exec rm {} \;
find . -name "*.log" -mmin +30 -exec rm {} \;
Skill 3:
Compress and uncompress files:
Compress: tar zcvf FileName.tar.gz DirName
Uncompress: tar zxvf FileName.tar.gz
Lookup: tar ztvf FileName.tar.gz
Skill 4:
Retrieve files from rpm package without installing it.
rpm2cpio foo.rpm | cpio -idmv
rpm2cpio changes rpm package into cpio format
Use cpio to retrieve file:
-i retrieve file
-d create directory structure according to rpm orginal file structure
-m remain files' update time
-v show processed file list