NPE while evaluating a query

dsha

Hi there,

I'm facing a problem with xDB crashing with NullPointerException while evaluating my query. Unfortunately due to obfuscation of xDB code I've no cues as to what is the origin of the problem. The scrambled stack trace is below:

java.lang.NullPointerException

at xDB_9_0_0.NH.a(xdb:251)

at xDB_9_0_0.NH.a(xdb:33)

at xDB_9_0_0.yL.<init>(xdb:179)

at xDB_9_0_0.NH.a(xdb:140)

at xDB_9_0_0.NH.a(xdb:125)

at xDB_9_0_0.lu.start(xdb:100)

at xDB_9_0_0.lu.aT(xdb:111)

at xDB_9_0_0.CN.aU(xdb:52)

at xDB_9_0_0.Cf.a(xdb:183)

at xDB_9_0_0.Cf.a(xdb:133)

at xDB_9_0_0.Cf.a(xdb:124)

at xDB_9_0_0.lu.start(xdb:100)

at xDB_9_0_0.lu.aT(xdb:111)

at xDB_9_0_0.CN.aU(xdb:52)

at xDB_9_0_0.Bn.dH(xdb:90)

at xDB_9_0_0.Am.getBooleanValue(xdb:47)

at xDB_9_0_0.jy.a(xdb:36)

at xDB_9_0_0.zy.dW(xdb:107)

at xDB_9_0_0.zy.aU(xdb:102)

at xDB_9_0_0.J.P(xdb:196)

at xDB_9_0_0.J.O(xdb:119)

at xDB_9_0_0.Fb.FU(xdb:128)

at xDB_9_0_0.xt.dH(xdb:69)

at xDB_9_0_0.rU.aU(xdb:33)

at xDB_9_0_0.yL.aU(xdb:185)

at xDB_9_0_0.hP.aU(xdb:533)

at xDB_9_0_0.hP.aU(xdb:533)

at xDB_9_0_0.lu.aT(xdb:118)

at xDB_9_0_0.CN.aU(xdb:52)

at xDB_9_0_0.hP.aU(xdb:533)

at xDB_9_0_0.lu.aT(xdb:118)

at xDB_9_0_0.lu.rb(xdb:84)

at xDB_9_0_0.lu.<init>(xdb:76)

at xDB_9_0_0.NH.a(xdb:275)

at xDB_9_0_0.pP.a(xdb:35)

at xDB_9_0_0.NH.a(xdb:125)

at xDB_9_0_0.NH.a(xdb:255)

at xDB_9_0_0.NH.a(xdb:33)

at xDB_9_0_0.yL.<init>(xdb:179)

at xDB_9_0_0.NH.a(xdb:140)

at xDB_9_0_0.NH.a(xdb:125)

at xDB_9_0_0.lu.start(xdb:100)

at xDB_9_0_0.lu.aV(xdb:140)

at xDB_9_0_0.CN.aV(xdb:72)

at xDB_9_0_0.lu.start(xdb:104)

at xDB_9_0_0.lu.aT(xdb:111)

at xDB_9_0_0.JD.a(xdb:39)

at xDB_9_0_0.NH.a(xdb:255)

at xDB_9_0_0.NH.a(xdb:33)

at xDB_9_0_0.yL.<init>(xdb:179)

at xDB_9_0_0.NH.a(xdb:140)

at xDB_9_0_0.NH.a(xdb:125)

at xDB_9_0_0.lu.start(xdb:100)

at xDB_9_0_0.lu.aV(xdb:140)

at xDB_9_0_0.CN.aV(xdb:72)

at xDB_9_0_0.lu.start(xdb:104)

at xDB_9_0_0.lu.aT(xdb:111)

at xDB_9_0_0.JD.a(xdb:39)

at xDB_9_0_0.NH.a(xdb:255)

at xDB_9_0_0.NH.a(xdb:33)

at xDB_9_0_0.yL.<init>(xdb:179)

at xDB_9_0_0.NH.a(xdb:140)

at xDB_9_0_0.NH.a(xdb:125)

at xDB_9_0_0.lu.start(xdb:100)

at xDB_9_0_0.lu.aT(xdb:111)

at xDB_9_0_0.CN.aU(xdb:52)

at xDB_9_0_0.hP.aU(xdb:533)

at xDB_9_0_0.Bn.dH(xdb:90)

at xDB_9_0_0.hB.a(xdb:32)

at xDB_9_0_0.yD.a(xdb:42)

at xDB_9_0_0.NH.a(xdb:122)

at xDB_9_0_0.pg.getBooleanValue(xdb:100)

at xDB_9_0_0.jy.a(xdb:36)

at xDB_9_0_0.xh.a(xdb:44)

at xDB_9_0_0.NH.a(xdb:255)

at xDB_9_0_0.NH.a(xdb:33)

at xDB_9_0_0.yL.<init>(xdb:179)

at xDB_9_0_0.NH.a(xdb:140)

at xDB_9_0_0.NH.a(xdb:125)

at xDB_9_0_0.lu.start(xdb:100)

at xDB_9_0_0.lu.rc(xdb:130)

at xDB_9_0_0.lu.rb(xdb:82)

at xDB_9_0_0.lu.<init>(xdb:76)

at xDB_9_0_0.NH.a(xdb:275)

at xDB_9_0_0.pP.a(xdb:35)

at xDB_9_0_0.NH.a(xdb:125)

at xDB_9_0_0.NH.a(xdb:255)

at xDB_9_0_0.NH.a(xdb:33)

at xDB_9_0_0.yL.Cp(xdb:225)

at xDB_9_0_0.yL.aU(xdb:188)

at xDB_9_0_0.hP.aU(xdb:533)

at xDB_9_0_0.zy.aU(xdb:98)

at xDB_9_0_0.J.P(xdb:196)

at xDB_9_0_0.J.O(xdb:119)

at xDB_9_0_0.Fb.FU(xdb:128)

at xDB_9_0_0.xt.dH(xdb:69)

at xDB_9_0_0.rU.aU(xdb:33)

at xDB_9_0_0.DD.aU(xdb:20)

at xDB_9_0_0.DD.hasNext(xdb:26)

Any ideas are appreciate. I'm a newbie to EMC XML products, so my apologies if this is an appropriate place to report problems like mine.

dsha

OK, it seems I've found the reason or at least close to it. My database includes several modules, some of which import others and call functions from them. The problem disappears after I added an import to my query for the module that is not used in the query directly but via other modules. So, I thought that this import is not necessary for the query, and it compiles fine without it only to crash later. I belive this is a kind of a bug in the xDB. Unfortunately, I've failed to repeat this scenario on a new small database, so it may be not as simple as above.

Still, comments/clarifications are welcome.