'+=' Operation not work. bash-3.0

thinker0

""""
RHEL4 not working

[ bin]$ ./flume
usage: flume command [args...]
commands include:
dump Takes a specified source and dumps to console
node Start a Flume node/agent (with watchdog)
master Start a Flume Master server (with watchdog)
version Dump flume build version information
node_nowatch Start a flume node/agent (no watchdog)
master_nowatch Start a Flume Master server (no watchdog)
class <class> Run specified fully qualified class using Flume environment (no watchdog)
ex: flume com.cloudera.flume.agent.FlumeNode
classpath Dump the classpath used by the java executables
shell Start the flume shell
killmaster Kill a running master
[ bin]$ ./flume dump console
./flume: line 93: JOPTS+=-Dflume.log.file=flume.log : command not found
./flume: line 94: JOPTS+=-Dflume.root.logger=INFO,console : command not found
./flume: line 95: JOPTS+=-Dzookeeper.root.logger=ERROR,console : command not found
./flume: line 96: JOPTS+=-Dwatchdog.root.logger=INFO,console : command not found
./flume: line 146: JOPTS+=-Djava.library.path=./lib : No such file or directory
./flume: line 151: CLASSPATH+=:/lib/tools.jar: No such file or directory
./flume: line 72: CLASSPATH+=:/usr/lib/zookeeper/zookeeper-3.3.1+7.jar: No such file or directory
./flume: line 164: CLASSPATH+=:./build/classes: No such file or directory
HADOOP_HOME is unset, hadoop jars may not be added to classpath
Exception in thread "main" java.lang.NoClassDefFoundError: com/cloudera/flume/agent/FlumeNode
Caused by: java.lang.ClassNotFoundException: com.cloudera.flume.agent.FlumeNode
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: com.cloudera.flume.agent.FlumeNode. Program will exit.
[bin]$ rpm -qa | grep bash
bash-3.0-21.el4_8.2
""""