I am using grails version: 2.3.7 to build my application. When I run my application, I get the error creating bean with null pointer exception (complete log as follows)
| Running Grails application
2015-03-02 14:52:45,663 [localhost-startStop-1] INFO context.ContextLoader - Root WebApplicationContext: initializatio
n started
2015-03-02 14:52:45,769 [localhost-startStop-1] INFO support.XmlWebApplicationContext - Refreshing Root WebApplication
Context: startup date [Mon Mar 02 14:52:45 CET 2015]; root of context hierarchy
2015-03-02 14:52:45,830 [localhost-startStop-1] INFO xml.XmlBeanDefinitionReader - Loading XML bean definitions from S
ervletContext resource [/WEB-INF/applicationContext.xml]
2015-03-02 14:52:46,098 [localhost-startStop-1] INFO support.DefaultListableBeanFactory - Pre-instantiating singletons
in org.springframework.beans.factory.support.DefaultListableBeanFactory@168484c: defining beans [grailsApplication,plug
inManager,grailsConfigurator,grailsResourceLoader,characterEncodingFilter,conversionService]; root of factory hierarchy
2015-03-02 14:52:50,516 [localhost-startStop-1] INFO context.ContextLoader - Root WebApplicationContext: initializatio
n completed in 4852 ms
2015-03-02 14:53:01,121 [localhost-startStop-1] INFO quartz.SchedulerFactoryBean - Shutting down Quartz Scheduler
Error |
2015-03-02 14:53:01,610 [localhost-startStop-1] ERROR context.GrailsContextLoader - Error initializing the application:
Error creating bean with name 'com.orga.odbc.DashboardController': Instantiation of bean failed; nested exception is or
g.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.orga.odbc.DashboardController]
: Constructor threw exception; nested exception is java.lang.NullPointerException
Message: Error creating bean with name 'com.orga.odbc.DashboardController': Instantiation of bean failed; nested excepti
on is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.orga.odbc.DashboardCon
troller]: Constructor threw exception; nested exception is java.lang.NullPointerException
Line | Method
->> 262 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 744 | run in java.lang.Thread
Caused by BeanInstantiationException: Could not instantiate bean class [com.orga.odbc.DashboardController]: Constructor
threw exception; nested exception is java.lang.NullPointerException
->> 262 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 744 | run in java.lang.Thread
Caused by NullPointerException: null
->> 16 | <init> in com.orga.odbc.DashboardController
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 262 | run in java.util.concurrent.FutureTask
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 744 | run . . . in java.lang.Thread
| Error Forked Grails VM exited with error
What couldbe the reason? How to debug it? I'll add the other resources upon response
Here is my DashboardController.groovy. It extends LoginController where I save username session upon login.
package com.orga.odbc
import grails.plugin.mail.MailService;
// import org.compass.core.engine.SearchEngineQueryParseException
import java.awt.TexturePaintContext.Int;
import com.sun.org.apache.xerces.internal.util.Status;
class DashboardController extends LoginController {
//static String WILDCARD = "*"
//def searchableService
def usr = DbUser.findByLoginNameIlike(session.username) // Find DbUser reference to the current user
ApplicationUtilityService appUtilService = new ApplicationUtilityService()
MailService mailService
def notifierService
def index(Integer max) {
log.info("***DASHBOARD***")
int objCount = 0, dropObjCount = 0
int schCount = 0, dropSchCount = 0
int progressSch
int progressObj
params.max = Math.min(max ?: 25, 100)
params.sort = params.sort?:"objects"
params.order = params.order?:"desc"
params.offset = params.offset?:0
if(session.username.equals('admin')){ // If user is admin
log.info('redirecting to admin index')
render(view:"../index")
}
else if(usr){ // If user found
def dbUsrSchSrvInstList = DbUserSchemaServer.findAllByUser(usr, [sort:params.sort, order:params.order, max:params.max, offset: params.offset]) // Schema, server info for current user
def usrQuota
appUtilService.updateUserStatus(usr) // Update the status of the current user
if(usr.quota){
usrQuota = [
name: usr.quota.identifier, // Quota identifier
schAllowed: usr.quota.maxSchemaCount, // Max. number of schemas allowed
objAllowed: usr.quota.maxObjectCount // Max. number of objects allowed
]
// Count total number of objects used
HashMap<String, BigInteger> schObjCount = appUtilService.getSchObjCount(usr)
schCount = schObjCount.get("SCHEMAS") // Schema count for the current user status no drop
objCount = schObjCount.get("OBJECTS") // Object count for the current user status no drop
dropSchCount = schObjCount.get("DROP_SCHEMAS") // Schemas with drop status
dropObjCount = schObjCount.get("DROP_OBJECTS") // Objects with drop status
if(usrQuota.schAllowed != 0 && usrQuota.objAllowed != 0){ // protect from divided by zero
progressSch = (schCount / usrQuota.schAllowed) * 100 // Schema usage current user
progressObj = (objCount / usrQuota.objAllowed) * 100 // Object usage current user
}
}
else{ // If user has no quota (May not happen for almost every user)
usrQuota = [
name: 'No quota assigned', // Quota identifier
schAllowed: 0, // Max. number of schemas allowed
objAllowed: 0 // Max. number of objects allowed
]
schCount = 0
progressSch = 0
progressObj = 0
}
log.info('progress schema: '+ progressSch)
log.info('progress objects: '+ progressObj)
log.info('Total number of objects: '+ objCount+dropObjCount)
// Search procedure
// def searchParamsList, searchParams, results_duplicates, results = []
// If no query string, display all users list
//if(!params.queryString){
results = dbUsrSchSrvInstList
//}
// Else display results
/* else{
try {
String searchTerm = WILDCARD+params.queryString+WILDCARD // take search term
searchParamsList = searchableService.search(dbUsrSchSrvInstList, searchTerm) // search matching term
searchParams = searchParamsList.results // Collect results
// Find results match with the current user
results_duplicates = searchParams.findAll{
it.id in dbUsrSchSrvInstList*.id
}
// Find by server name. Match results and append to results list
results_duplicates = results_duplicates.plus(dbUsrSchSrvInstList.findAll {
it.server.id in searchParams.id
})
// remove duplicates in results
results_duplicates.id.unique().each {
results.add(DbUserSchemaServer.get(it))
}
} catch (SearchEngineQueryParseException ex) {
ex.printStackTrace()
}
} */
//return parameters
[ dbUserInstance: usr,
dbUsrSchSrvInstList: results,
schCount: schCount,
totalSchCount: schCount + dropSchCount,
objCount:objCount,
totalObjCount: objCount + dropObjCount,
usrQuota:usrQuota,
progressSch: progressSch,
progressObj: progressObj
] // return list of schemas related to the current user
}
}
}
The problem was with the instance variable
def usr = DbUser.findByLoginNameIlike(session.username) // Find DbUser reference to the current user
When DashboardController is instantiated, it tries to execute the above line where no session is stored yet (session.username is NULL).
Moving this piece of code inside the methods solved the problem.