请问"message":"Unkown Exception","status":"500"怎么解决

[veronic]

通过http请求使用GAnswer：
http://localhost:9999/gSolve/?data={maxAnswerNum:1, maxSparqlNum:2, question:Who is the wife of Donald Trump?}
返回的是：
{"question":"Who is the wife of Donald Trump?","message":"Unkown Exception","status":"500"}

后台日志：
[Input:] Who is the wife of Donald Trump?
EntityRecognizer Initial : ok!
--------- entity/type recognition start ---------
Type Check: wife
Type Check: Donald
Ent Check: Donald
DBpediaLookup find: [David Cameron, Thor (Marvel Comics), New Statesman, Donald Duck, Donald Bradman], Drop Donald_Bradman because it not in Entity Dictionary. DBpediaLookup select: [David_Cameron(40.0), Thor_(Marvel_Comics)(38.0), New_Statesman(36.0), Donald_Duck(34.0)]
Type Check: Trump
Ent Check: Trump
DBpediaLookup find: [Donald Trump, Last Judgment, Suit (cards), Boardwalk Hall, Jew's harp], Drop Last_Judgment because it not in Entity Dictionary. Drop Suit_(cards) because it not in Entity Dictionary. Drop Jew's_harp because it not in Entity Dictionary. DBpediaLookup select: [Donald_Trump(40.0), Boardwalk_Hall(38.0)]
Type Check: Donald_Trump
Ent Check: Donald_Trump
DBpediaLookup find: [Donald Trump, Donald Trump, Jr., Trump Model Management, Donald J. Trump State Park, Donald Trump (song)], DBpediaLookup select: [Donald_Trump(40.0), Donald_Trump,Jr.(38.0), Trump_Model_Management(36.0), Donald_J.Trump_State_Park(34.0), Donald_Trump(song)(32.0)]
Type Check: wife_of_Donald
Type Check: the_wife_of_Donald
Type Check: wife_of_Donald_Trump
Ent Check: wife_of_Donald_Trump
Type Check: the_wife_of_Donald_Trump
Ent Check: the_wife_of_Donald_Trump
------- Result ------
Detect entity mapping: Donald: [
David_Cameron, Thor(Marvel_Comics), Donald_Lu, New_Statesman, Donald_Duck, Donald_Sur, Donald_Rix, Donald_Zec, Donald_May, Donald_Box, ]
Detect entity mapping: Trump: [
Donald_Trump, Boardwalk_Hall, Jay_Trump, Len_Trump, Eric_Trump, Trump_SoHo, Tone_Trump, Judd_Trump, Fred_Trump, Kelly_Trump, ]
Detect entity mapping: Donald_Trump: [
Donald_Trump, Donald_Trump, Donald_Trump,_Jr., Trump_Model_Management, Donald_J.Trump_State_Park, Donald_Trump(song), Donald_Trump_Jr., Donald_Trump,Jr., Donald_Trump(song), Donald_Trump_presidential_campaign,_2016, ]
Merged: Who is the wife of Donald_Trump ?
Total check time: 3982ms
--------- pre entity/type recognition end ---------
step0 [Node Recognition] : 3984ms
transQ: Who is the wife of Donald_Trump ?
====StanfordDependencies(8ms)====
-> be-VBZ (root)[2]
-> wife-NN (nsubj)[4]
-> of-IN (prep)[5]
-> donald_trump-NN (pobj)[6]
-> the-DT (det)[3]
-> who-WP (attr)[1]

====MaltDependencies(1ms)====
-> be-VBZ (root)[2]
-> wife-NN (nsubj)[4]
-> of-IN (prep)[5]
-> donald_trump-NN (pobj)[6]
-> the-DT (det)[3]
-> who-WP (attr)[1]

====NameEntityRecognition(0ms)====
Who[1] ner=null
is[2] ner=null
the[3] ner=null
wife[4] ner=null
of[5] ner=null
Donald_Trump[6] ner=null
?[7] ner=null
Shortest Path between <wife-NN(nsubj)[4]> and <Donald_Trump-NN(pobj)[6]>:
-<wife-NN(nsubj)[4]>-<of-IN(prep)[5]>-<Donald_Trump-NN(pobj)[6]>-
==========Group Simple Relations=========

Check query graph count: 70
Pass single check: 0
Pass final check: 0
TopkJoin time=0
number of rankedSparqls = 0