Scott Duan created AMBARI-23797:
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Summary: Handle null values for configurations in the Execution
Command API
Key: AMBARI-23797
URL: https://issues.apache.org/jira/browse/AMBARI-23797
Project: Ambari
Issue Type: Bug
Components: ambari-server
Affects Versions: 3.0.0
Reporter: Scott Duan
Assignee: Scott Duan
Fix For: 3.0.0
/var/lib/ambari-agent/cache/cluster_cache/configurations.json
{noformat}
"zookeeper-env": {
"content": "\nexport JAVA_HOME=\{{java64_home}}\nexport
ZOOKEEPER_HOME=\{{zk_home}}\nexport ZOO_LOG_DIR=\{{zk_log_dir}}\nexport
ZOOPIDFILE=\{{zk_pid_file}}\nexport
SERVER_JVMFLAGS=\{{zk_server_heapsize}}\nexport
JAVA=$JAVA_HOME/bin/java\nexport
CLASSPATH=$CLASSPATH:/usr/share/zookeeper/*\n\n\{% if security_enabled
%}\nexport SERVER_JVMFLAGS=\"$SERVER_JVMFLAGS
-Djava.security.auth.login.config=\{{zk_server_jaas_file}}\"\nexport
CLIENT_JVMFLAGS=\"$CLIENT_JVMFLAGS
-Djava.security.auth.login.config=\{{zk_client_jaas_file}}\"\n\{% endif %}",
"zk_server_heapsize": "1024m",
"zk_user": "zookeeper",
"zookeeper_keytab_path": null,
"zk_log_dir": "/var/log/zookeeper",
"zookeeper_principal_name": null,
"zk_pid_dir": "/var/run/zookeeper"
}
{noformat}
Related code
params.py
{noformat}
zk_principal_name = module_configs.get_property_value(module_name,
'zookeeper-env', 'zookeeper_principal_name', 'zookee...@example.com')
zk_principal = zk_principal_name.replace('_HOST', hostname.lower())
{noformat}
the api only picks up the default when no key exists
if zookeeper_principal_name does not exist
it will return default value
but now zookeeper_principal_name maps to value null
so api thinks null is a valid value
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