[jira] [Created] (CLOUDSTACK-1551) Failed to list clusters due to NPE at createClusterResponse(ApiResponseHelper.java:837)

["Alena Prokharchyk (JIRA)" <ji...@apache.org>]

Alena Prokharchyk created CLOUDSTACK-1551:
---------------------------------------------

             Summary: Failed to list clusters due to NPE at createClusterResponse(ApiResponseHelper.java:837)
                 Key: CLOUDSTACK-1551
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-1551
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: API
    Affects Versions: 4.2.0
            Reporter: Alena Prokharchyk
            Assignee: Bharat Kumar
             Fix For: 4.2.0


aa40c7ee98b36370069effb68388ba751d7dc6e5

Steps to reproduce (faced on the fresh setup):

1) Added zone, pod and new cluster. 
2) Added new host to the cluster
3) Tried to add storage pool to the cluster, but it failed (incorrect mount path was specified in the API)

After that listCluster command resulted in NPE:

http://localhost:8080/client/api?command=listClusters&response=json&sessionkey=%2BJ9JQhHyFWblhnVYuWO%2BKOG6UF0%3D&page=1&pagesize=1&_=1362604226148

INFO  [cloud.api.ApiServer] (ApiServer-4:) Invalid request, no command sent
ERROR [cloud.api.ApiServer] (1994818910@qtp-1007211197-20:) unhandled exception executing api command: listClusters
java.lang.NullPointerException
	at com.cloud.api.ApiResponseHelper.createClusterResponse(ApiResponseHelper.java:837)
	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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
	at com.cloud.utils.db.TransactionContextBuilder.AroundAnyMethod(TransactionContextBuilder.java:40)
	at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	at $Proxy377.createClusterResponse(Unknown Source)
	at org.apache.cloudstack.api.command.admin.cluster.ListClustersCmd.execute(ListClustersCmd.java:137)
	at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:163)
	at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)


"cluster_details" DB table is empty:

mysql> select * from cluster_details;
Empty set (0.00 sec)

"cluster" table has an entry:

mysql> select * from cluster;
+----+------------+--------------------------------------+--------------------------------------+--------+----------------+-----------------+--------------+------------------+---------------+---------+-------+---------+-------------+--------------+
| id | name       | uuid                                 | guid                                 | pod_id | data_center_id | hypervisor_type | cluster_type | allocation_state | managed_state | removed | owner | created | lastUpdated | engine_state |
+----+------------+--------------------------------------+--------------------------------------+--------+----------------+-----------------+--------------+------------------+---------------+---------+-------+---------+-------------+--------------+
|  1 | alenazone1 | 8858f907-731a-46b7-982e-f5fbe6fddb5d | be15d332-a3a6-c4c7-32af-8185fdf31888 |      1 |              1 | xenserver       | CloudManaged | Enabled          | Managed       | NULL    | NULL  | NULL    | NULL        | Disabled     |
+----+------------+--------------------------------------+--------------------------------------+--------+----------------+-----------------+--------------+------------------+---------------+---------+-------+---------+-------------+--------------+
1 row in set (0.00 sec)


The only one host in the cluster is up:

mysql> select id, name, status from host where id=2;
+----+---------------+--------+
| id | name          | status |
+----+---------------+--------+
|  2 | xenserver-min | Up     |
+----+---------------+--------+
1 row in set (0.00 sec)

NPE happened because api layer tries to retrieve cluster details assuming that they are always in cluster_details table.


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