Bug 719734

Summary: "ORA-01795: maximum number of expressions in a list is 1000" SQLException when trying to import 300 platforms and their child servers via autodiscovery queue view (error occurs in query executed by DiscoveryBossBean.checkStatus())
Product: [Other] RHQ Project Reporter: Ian Springer <ian.springer>
Component: Core ServerAssignee: Ian Springer <ian.springer>
Status: CLOSED CURRENTRELEASE QA Contact: Mike Foley <mfoley>
Severity: medium Docs Contact:
Priority: high    
Version: 4.0.1CC: ccrouch, hrupp
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-02-07 19:25:23 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 720762, 678340    

Description Ian Springer 2011-07-07 19:34:17 UTC 
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query
	at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:629)
	at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:73)
	at org.rhq.enterprise.server.discovery.DiscoveryBossBean.checkStatus(DiscoveryBossBean.java:918)
	at org.rhq.enterprise.server.discovery.DiscoveryBossBean.importResources(DiscoveryBossBean.java:892)

<snip>

Caused by: java.sql.SQLException: ORA-01795: maximum number of expressions in a list is 1000

	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439)
	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395)
	at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802)
	at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436)
	at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186)
	at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521)
	at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:205)
	at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:861)
	at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1145)
	at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1267)
	at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3449)
	at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3493)
	at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1203)
	at org.jboss.resource.adapter.jdbc.CachedPreparedStatement.executeQuery(CachedPreparedStatement.java:90)
	at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:342)
	at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:187)
Comment 1 Ian Springer 2011-07-11 19:26:53 UTC 
This is fixed by [master cc69251] and [master 902a31c]. 

Note, though importing a large number of Resources now works, it takes a very long time. For example, to import 1500 Resources (300 platforms and 1200 servers), it took 10 minutes.
Comment 2 Mike Foley 2011-07-11 20:22:10 UTC 
discussed and agreed upon a verification approach with ips:

1) use the perftest plugin  ... add the plugin, plugins update, etc...

2) http://rhq-project.org/display/RHQ/Test+Using+the+Perftest+Plugin

3) begin by using the sample scenario specification

Example Scenario Specification

<resource type="server-a">
<simpleResourceGenerator numberOfResources="1"/>
<simpleNumericMeasurementGenerator/>
<simpleArtifactGenerator artifactType="artifact2" numberOfArtifacts="20">
<simpleArtifactRevisionGenerator numberOfRevisions="5"/>
</simpleArtifactGenerator>
</resource>


4) ... and change the numberOfResources="1000"

5) additionally consider changing the numberOfRevisions and numberOfArtifacts to do some additional testing in this area...
Comment 3 Mike Foley 2011-07-27 20:03:27 UTC 
verified.  used the perftest plugin as described above.
Comment 4 Mike Foley 2012-02-07 19:25:23 UTC 
changing status of VERIFIED BZs for JON 2.4.2 and JON 3.0 to CLOSED/CURRENTRELEASE