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https://issues.apache.org/jira/browse/CHUKWA-543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12934201#action_12934201
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Ahmed Fathalla commented on CHUKWA-543:
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I tried this patch and this exception is no longer being displayed.
> JSONException in hicc.log file
> ------------------------------
>
> Key: CHUKWA-543
> URL: https://issues.apache.org/jira/browse/CHUKWA-543
> Project: Chukwa
> Issue Type: Bug
> Components: User Interface
> Affects Versions: 0.4.0
> Reporter: Eric Yang
> Assignee: Eric Yang
> Fix For: 0.5.0
>
> Attachments: ViewStore.java
>
>
> Quote from mailing list:
> Hi all,
> We deployed chukwa on a 5 nodescluster where hadoop's version is
> hadoop 0.20.2 and chukwa's is 0.4.0. After some logs of NameNode were
> successfully collectected and processed by chukwa, we started hicc
> server. The hicc produced files listed below on HDFS,
> # bin/hadoop dfs -lsr /chukwa/hicc/views/
> drwxr-xr-x - root supergroup 0 2010-11-04 13:01
> /chukwa/hicc/views/public
> -rw-r--r-- 2 root supergroup 22177 2010-11-04 13:01
> /chukwa/hicc/views/public/default.view
> -rw-r--r-- 2 root supergroup 236 2010-11-04 13:01
> /chukwa/hicc/views/public/newview.tpl
> -rw-r--r-- 2 root supergroup 46 2010-11-04 13:01
> /chukwa/hicc/views/public/view.permission
> -rw-r--r-- 2 root supergroup 103 2010-11-04 13:01
> /chukwa/hicc/views/public/workspace_view_list.cache
> drwxr-xr-x - root supergroup 0 2010-11-04 13:01
> /chukwa/hicc/views/users
> We digged into the hicc.log and found that it encountered some
> exceptions about JSON.
> 2010-11-04 14:00:16,954 ERROR btpool0-3 ViewBean -
> org.json.JSONException: JSONObject["owner"] not found.
> at org.json.JSONObject.get(JSONObject.java:283)
> at org.json.JSONObject.getString(JSONObject.java:409)
> at org.apache.hadoop.chukwa.rest.bean.ViewBean.<init>(ViewBean.java:62)
> at
> org.apache.hadoop.chukwa.datastore.ViewStore.list(ViewStore.java:217)
> at
> org.apache.hadoop.chukwa.rest.resource.ViewResource.getUserViewList(ViewResource.java:159)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:156)
> at
> com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:67)
> at
> com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:166)
> at
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:114)
> at
> com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:74)
> at
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:114)
> at
> com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:66)
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:658)
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:616)
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:607)
> at
> com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:309)
> /pathList
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
> After further analysis, we found the problem is caused by at lines in
> ViewStore.list()
> String[] pathList = new String[2];
> pathList[0]=viewPath.toString();
> pathList[1]=publicViewPath;
> JSONArray list = new JSONArray();
> for(String path : pathList) {
> Path viewFile = new Path(path);
> try {
> FileSystem fs = FileSystem.get(config);
> FileStatus[] fstatus = fs.listStatus(viewFile);
> if(fstatus!=null) {
> for(int i=0;i<fstatus.length;i++) {
> long size = fstatus[i].getLen();
> FSDataInputStream viewStream = fs.open(fstatus[i].getPath());
> byte[] buffer = new byte[(int)size];
> viewStream.readFully(buffer);
> viewStream.close();
> try {
> ViewBean view = new ViewBean(new JSONObject(new String(buffer)));
> JSONObject json = new JSONObject();
> json.put("name", view.getName());
> json.put("type", view.getPermissionType());
> json.put("owner", view.getOwner());
> if(uid.intern()==view.getOwner().intern()) {
> json.put("editable","true");
> } else {
> json.put("editable","false");
> }
> list.put(json);
> } catch (Exception e) {
> log.error(ExceptionUtil.getStackTrace(e));
> }
> }
> }
> } catch (IOException ex) {
> ...
> }
> }
> All files of /chukwa/hicc/views/public/ would be read and then parsed
> into json objects. After that, those json objects were passed to
> ViewBean's constructor which will run
> json.getString("owner"). But there is only one file(default.view) 's
> json has this key. So the exception throwed.
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