Saisai Shao created CHUKWA-654:
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Summary: HICC session hosts bug
Key: CHUKWA-654
URL: https://issues.apache.org/jira/browse/CHUKWA-654
Project: Chukwa
Issue Type: Bug
Components: User Interface
Affects Versions: 0.6.0
Environment: RHEL5 Hadoop 1.0.3 Hbase0.94.0
Reporter: Saisai Shao
Fix For: 0.6.0
when using Host Selector widget to select one host, like "localhost", in
workspace.js code save_host() function
for(var i=0;i< obj.options.length;i++) {
if(obj.options[i].selected) {
if(i!=0) {
cookie = cookie + "," + obj.options[i].value;
} else {
cookie = obj.options[i].value;
}
}
}
var myAjax=new Ajax.Request(
"/hicc/jsp/session.jsp",
{
asynchronous: false,
method: 'post',
parameters: "hosts="+cookie
}
);
this code will rise a ajax request to set hosts in session, but the hosts
variable in session will be set like ",localhost", a additional comma will be
added even there is only one host selected. I think this bug is introduced by
above code.
And this will cause MetricsController.java getSeriesBySessionAttribute()
String[] rkeys = (session.getAttribute(skey).toString()).split(",");
to split this hosts variable to a zero length string, like string "" and
string "localhost", using this string "" to get data in HBase will retrieve no
data.
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