[OAK-6359] Change behavior for very complex queries

• Type: Improvement
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.7.5, 1.6.4, 1.4.18, 1.8.0
• Component/s: query
• Assignee: Thomas Mueller
• Reporter: Thomas Mueller
• Created: 16/Jun/17 08:06
• Updated: 12/Jul/19 12:01
• Resolved: 21/Jul/17 12:35

Description

Very complex queries can cause take a long time to parse, and can possibly cause OOME. It would be good if processing queries automatically stops after some number of loops, after some time, or some amount of memory was used. And then throw an exception "query too complex".

Example query:

//element(*,rep:Authorizable)[ ( (  
 jcr:like(fn:lower-case(fn:name()), 'audio%')
 or jcr:contains(@rep:principalName,'audio*')
 or jcr:contains(@cq:first-name,'audio*')
 or jcr:contains(@cq:last-name,'audio*')
 or jcr:contains(profile/@givenName,'audio*')
 or jcr:contains(profile/@familyName,'audio*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'conference%')
 or jcr:contains(@rep:principalName,'conference*')
 or jcr:contains(@cq:first-name,'conference*')
 or jcr:contains(@cq:last-name,'conference*')
 or jcr:contains(profile/@givenName,'conference*')
 or jcr:contains(profile/@familyName,'conference*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'details:%')
 or jcr:contains(@rep:principalName,'details:*')
 or jcr:contains(@cq:first-name,'details:*')
 or jcr:contains(@cq:last-name,'details:*')
 or jcr:contains(profile/@givenName,'details:*')
 or jcr:contains(profile/@familyName,'details:*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'conference%')
 or jcr:contains(@rep:principalName,'conference*')
 or jcr:contains(@cq:first-name,'conference*')
 or jcr:contains(@cq:last-name,'conference*')
 or jcr:contains(profile/@givenName,'conference*')
 or jcr:contains(profile/@familyName,'conference*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'code:%')
 or jcr:contains(@rep:principalName,'code:*')
 or jcr:contains(@cq:first-name,'code:*')
 or jcr:contains(@cq:last-name,'code:*')
 or jcr:contains(profile/@givenName,'code:*')
 or jcr:contains(profile/@familyName,'code:*') )
 and (  jcr:like(fn:lower-case(fn:name()), '123456%')
 or jcr:contains(@rep:principalName,'123456*')
 or jcr:contains(@cq:first-name,'123456*')
 or jcr:contains(@cq:last-name,'123456*')
 or jcr:contains(profile/@givenName,'123456*')
 or jcr:contains(profile/@familyName,'123456*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'further%')
 or jcr:contains(@rep:principalName,'further*')
 or jcr:contains(@cq:first-name,'further*')
 or jcr:contains(@cq:last-name,'further*')
 or jcr:contains(profile/@givenName,'further*')
 or jcr:contains(profile/@familyName,'further*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'dial%')
 or jcr:contains(@rep:principalName,'dial*')
 or jcr:contains(@cq:first-name,'dial*')
 or jcr:contains(@cq:last-name,'dial*')
 or jcr:contains(profile/@givenName,'dial*')
 or jcr:contains(profile/@familyName,'dial*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'in%')
 or jcr:contains(@rep:principalName,'in*')
 or jcr:contains(@cq:first-name,'in*')
 or jcr:contains(@cq:last-name,'in*')
 or jcr:contains(profile/@givenName,'in*')
 or jcr:contains(profile/@familyName,'in*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'numbers:%')
 or jcr:contains(@rep:principalName,'numbers:*')
 or jcr:contains(@cq:first-name,'numbers:*')
 or jcr:contains(@cq:last-name,'numbers:*')
 or jcr:contains(profile/@givenName,'numbers:*')
 or jcr:contains(profile/@familyName,'numbers:*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'http://wikipedia.org%')
 or jcr:contains(@rep:principalName,'http://wikipedia.org*')
 or jcr:contains(@cq:first-name,'http://wikipedia.org*')
 or jcr:contains(@cq:last-name,'http://wikipedia.org*')
 or jcr:contains(profile/@givenName,'http://wikipedia.org*')
 or jcr:contains(profile/@familyName,'http://wikipedia.org*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'conference%')
 or jcr:contains(@rep:principalName,'conference*')
 or jcr:contains(@cq:first-name,'conference*')
 or jcr:contains(@cq:last-name,'conference*')
 or jcr:contains(profile/@givenName,'conference*')
 or jcr:contains(profile/@familyName,'conference*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'number(s):%')
 or jcr:contains(@rep:principalName,'number(s):*')
 or jcr:contains(@cq:first-name,'number(s):*')
 or jcr:contains(@cq:last-name,'number(s):*')
 or jcr:contains(profile/@givenName,'number(s):*')
 or jcr:contains(profile/@familyName,'number(s):*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'emea:%')
 or jcr:contains(@rep:principalName,'emea:*')
 or jcr:contains(@cq:first-name,'emea:*')
 or jcr:contains(@cq:last-name,'emea:*')
 or jcr:contains(profile/@givenName,'emea:*')
 or jcr:contains(profile/@familyName,'emea:*') )
 and (  jcr:like(fn:lower-case(fn:name()), '%')
 or jcr:contains(@rep:principalName,'*')
 or jcr:contains(@cq:first-name,'*')
 or jcr:contains(@cq:last-name,'*')
 or jcr:contains(profile/@givenName,'*')
 or jcr:contains(profile/@familyName,'*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'test%')
 or jcr:contains(@rep:principalName,'test*')
 or jcr:contains(@cq:first-name,'test*')
 or jcr:contains(@cq:last-name,'test*')
 or jcr:contains(profile/@givenName,'test*')
 or jcr:contains(profile/@familyName,'test*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'to%')
 or jcr:contains(@rep:principalName,'to*')
 or jcr:contains(@cq:first-name,'to*')
 or jcr:contains(@cq:last-name,'to*')
 or jcr:contains(profile/@givenName,'to*')
 or jcr:contains(profile/@familyName,'to*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'join%')
 or jcr:contains(@rep:principalName,'join*')
 or jcr:contains(@cq:first-name,'join*')
 or jcr:contains(@cq:last-name,'join*')
 or jcr:contains(profile/@givenName,'join*')
 or jcr:contains(profile/@familyName,'join*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'the%')
 or jcr:contains(@rep:principalName,'the*')
 or jcr:contains(@cq:first-name,'the*')
 or jcr:contains(@cq:last-name,'the*')
 or jcr:contains(profile/@givenName,'the*')
 or jcr:contains(profile/@familyName,'the*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'meeting:%')
 or jcr:contains(@rep:principalName,'meeting:*')
 or jcr:contains(@cq:first-name,'meeting:*')
 or jcr:contains(@cq:last-name,'meeting:*')
 or jcr:contains(profile/@givenName,'meeting:*')
 or jcr:contains(profile/@familyName,'meeting:*') )
 and (  jcr:like(fn:lower-case(fn:name()), 'http://wikipedia.org%')
 or jcr:contains(@rep:principalName,'http://wikipedia.org*')
 or jcr:contains(@cq:first-name,'http://wikipedia.org*')
 or jcr:contains(@cq:last-name,'http://wikipedia.org*')
 or jcr:contains(profile/@givenName,'http://wikipedia.org*')
 or jcr:contains(profile/@familyName,'http://wikipedia.org*') ) ) ] 
 order by @rep:principalName