sadhu suresh created CLOUDSTACK-100:
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             Summary: capcityChecker throws exception in specific scenario
                 Key: CLOUDSTACK-100
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-100
             Project: CloudStack
          Issue Type: Bug
          Components: Management Server
    Affects Versions: pre-4.0.0
         Environment: Git Revision: 03df2fa9dd45c938f72cd1866044b09d1b0cc978
Git URL: https://git-wip-us.apache.org/repos/asf/incubator-cloudstack.gi

            Reporter: sadhu suresh
         Attachments: management-server.log.2012-09-12.gz

Runtime exception noticed when we Install MS on a VM with less memory resources

Steps:
1.Install new build on rhel6.3 OS
2.make sure your Ms has less memory capacity(i.e In the current environment 
Management server heartbeat takes too long to finish)
3.try to create advance zone with xen as hypervior and observe the behavior

Actual result:
Noticed exception in the log while its adding primary storage during zone 
creation operation and it took long time to finish addZone operation due to  
communication took long time to  finish between host and Management server.


Capacity Checker throws runtime exception caused by some sql exception...and 
exception says "you have error in SQL syntax"

*********************
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have 
an error in your SQL syntax; check the manual that corresponds to your MySQL 
server version for the right syntax to use near 'B' at line 1
**********************

Content of management log:

2012-09-12 16:34:44,074 DEBUG [cloud.cluster.ClusterManagerImpl] 
(Cluster-Heartbeat-1:null) Management server heartbeat takes too long to 
finish. profiler: Done. Duration: 8837ms, profilerHeartbeatUpdate: Done. 
Duration: 3455ms, profilerPeerScan: Done. Duration: 5382ms, profilerAgentLB: 
Done. Duration: 0ms
2012-09-12 16:34:49,824 DEBUG [cloud.cluster.ClusterManagerImpl] 
(Cluster-Heartbeat-1:null) Peer scan takes too long to finish. profiler: Done. 
Duration: 4631ms, profilerQueryActiveList: Done. Duration: 2637ms, 
profilerSyncClusterInfo: Done. Duration: 1994ms, profilerInvalidatedNodeList: 
Done. Duration: 0ms, profilerRemovedList: Done. Duration: 0ms
2012-09-12 16:34:52,543 DEBUG [cloud.cluster.ClusterManagerImpl] 
(Cluster-Heartbeat-1:null) Management server heartbeat takes too long to 
finish. profiler: Done. Duration: 4699ms, profilerHeartbeatUpdate: Done. 
Duration: 68ms, profilerPeerScan: Done. Duration: 4631ms, profilerAgentLB: 
Done. Duration: 0ms
2012-09-12 16:34:54,854 DEBUG 
[network.router.VirtualNetworkApplianceManagerImpl] 
(RouterStatusMonitor-1:null) Found 0 routers.
2012-09-12 16:34:56,316 DEBUG [cloud.cluster.ClusterManagerImpl] 
(Cluster-Heartbeat-1:null) Management server heartbeat takes too long to 
finish. profiler: Done. Duration: 2112ms, profilerHeartbeatUpdate: Done. 
Duration: 704ms, profilerPeerScan: Done. Duration: 1408ms, profilerAgentLB: 
Done. Duration: 0ms
2012-09-12 16:35:01,183 INFO  [agent.manager.AgentMonitor] (AgentMonitor:null) 
Found the following agents behind on ping: [1]
2012-09-12 16:35:01,276 DEBUG [cloud.cluster.ClusterManagerImpl] 
(Cluster-Heartbeat-1:null) Peer scan takes too long to finish. profiler: Done. 
Duration: 4690ms, profilerQueryActiveList: Done. Duration: 4394ms, 
profilerSyncClusterInfo: Done. Duration: 296ms, profilerInvalidatedNodeList: 
Done. Duration: 0ms, profilerRemovedList: Done. Duration: 0ms
2012-09-12 16:35:01,634 DEBUG [cloud.cluster.ClusterManagerImpl] 
(Cluster-Heartbeat-1:null) Management server heartbeat takes too long to 
finish. profiler: Done. Duration: 5318ms, profilerHeartbeatUpdate: Done. 
Duration: 265ms, profilerPeerScan: Done. Duration: 5053ms, profilerAgentLB: 
Done. Duration: 0ms
2012-09-12 16:35:01,874 ERROR [cloud.alert.AlertManagerImpl] 
(CapacityChecker:null) Exception in CapacityChecker
com.cloud.utils.exception.CloudRuntimeException: DB Exception on: 
org.apache.commons.dbcp.DelegatingPreparedStatement@a9ee006
        at 
com.cloud.utils.db.GenericDaoBase.customSearchIncludingRemoved(GenericDaoBase.java:479)
        at 
com.cloud.utils.db.DatabaseCallback.intercept(DatabaseCallback.java:34)
        at 
com.cloud.capacity.dao.CapacityDaoImpl.findCapacityBy(CapacityDaoImpl.java:355)
        at 
com.cloud.utils.db.DatabaseCallback.intercept(DatabaseCallback.java:34)
        at 
com.cloud.alert.AlertManagerImpl.checkForAlerts(AlertManagerImpl.java:473)
        at 
com.cloud.alert.AlertManagerImpl$CapacityChecker.run(AlertManagerImpl.java:442)
        at java.util.TimerThread.mainLoop(Timer.java:534)
        at java.util.TimerThread.run(Timer.java:484)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have 
an error in your SQL syntax; check the manual that corresponds to your MySQL 
server version for the right syntax to use near 'B' at line 1
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
        at com.mysql.jdbc.Util.getInstance(Util.java:386)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1053)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2468)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2629)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2719)
        at 
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
        at 
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2318)
        at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:97)
        at 
com.cloud.utils.db.GenericDaoBase.customSearchIncludingRemoved(GenericDaoBase.java:459)
        ... 15 more
2012-09-12 16:35:33,894 DEBUG [cloud.alert.AlertManagerImpl] 
(CapacityChecker:null) Running Capacity Checker ...
2012-09-12 16:35:31,364 DEBUG 
[network.router.VirtualNetworkApplianceManagerImpl] 
(RouterStatusMonitor-1:null) Found 0 routers.
2012-09-12 16:35:31,191 DEBUG [cloud.server.StatsCollector] 
(StatsCollector-3:null) StorageCollector is running...
2012-09-12 16:35:31,191 DEBUG [cloud.server.StatsCollector] 
(StatsCollector-2:null) VmStatsCollector is running...
2012-09-12 16:35:15,394 DEBUG [agent.manager.AgentAttache] 
(AgentTaskPool-1:null) Seq 1-1550843917: Waiting some more time because this is 
the current command
2012-09-12 16:35:13,612 DEBUG [agent.manager.DirectAgentAttache] 
(DirectAgent-9:null) Ping from 1
2012-09-12 16:35:08,496 DEBUG [cloud.host.Status] (AgentMonitor:null) Ping 
timeout for host 1, do invstigation
2012-09-12 16:35:05,456 DEBUG [cloud.cluster.ClusterManagerImpl] 
(Cluster-Heartbeat-1:null) Peer scan takes too long to finish. profiler: Done. 
Duration: 3620ms, profilerQueryActiveList: Done. Duration: 188ms, 
profilerSyncClusterInfo: Done. Duration: 3432ms, profilerInvalidatedNodeList: 
Done. Duration: 0ms, profilerRemovedList: Done. Duration: 0ms
2012-09-12 16:35:01,875 ERROR [cloud.api.ApiDispatcher] (catalina-exec-13:null) 
Exception while executing ListCapacityCmd:
java.lang.NullPointerException
        at 
com.cloud.capacity.dao.CapacityDaoImpl.findCapacityBy(CapacityDaoImpl.java:319)
        at 
com.cloud.utils.db.DatabaseCallback.intercept(DatabaseCallback.java:34)
        at 
com.cloud.server.ManagementServerImpl.listCapacities(ManagementServerImpl.java:2216)
        at 
com.cloud.api.commands.ListCapacityCmd.execute(ListCapacityCmd.java:129)
        at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:138)
        at com.cloud.api.ApiServer.queueCommand(ApiServer.java:543)
        at com.cloud.api.ApiServer.handleRequest(ApiServer.java:422)
        at com.cloud.api.ApiServlet.processRequest(ApiServlet.java:304)
        at com.cloud.api.ApiServlet.doGet(ApiServlet.java:63)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at 
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
        at 
org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:889)
        at 
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:721)
        at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:2268)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:679)




Expected result:
 AddZone should be completed with out any errors and exception should be caught 
and alert the user with proper information.

should not get any syntax error exception like  MySQLSyntaxErrorExceptions seen 
above logs.


Note:Not seen the problem when increase the memory on VM  from 52 to 2GB.also 
did xe-toolstack-restart ... on xen host.









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