The solutions trace log and SPARQL query log examples need to be present (but not activated) in the default log4j.properties file.

## 
# Solutions trace (tab delimited file).  Uncomment the next line to enable.
#log4j.logger.com.bigdata.bop.engine.SolutionsLog=INFO,solutionsLog
log4j.additivity.com.bigdata.bop.engine.SolutionsLog=false
log4j.appender.solutionsLog=org.apache.log4j.ConsoleAppender
#log4j.appender.solutionsLog=org.apache.log4j.FileAppender
log4j.appender.solutionsLog.Threshold=ALL
log4j.appender.solutionsLog.File=solutions.csv
log4j.appender.solutionsLog.Append=true
# I find that it is nicer to have this unbuffered since you can see what
# is going on and to make sure that I have complete rule evaluation logs
# on shutdown.
log4j.appender.solutionsLog.BufferedIO=false
log4j.appender.solutionsLog.layout=org.apache.log4j.PatternLayout
log4j.appender.solutionsLog.layout.ConversionPattern=SOLUTION:\t%m

## 
# SPARQL query trace (plain text file).  Uncomment 2nd line to enable.
log4j.logger.com.bigdata.rdf.sparql.ast.eval.ASTEvalHelper=WARN
#log4j.logger.com.bigdata.rdf.sparql.ast.eval.ASTEvalHelper=INFO,sparqlLog
log4j.additivity.com.bigdata.rdf.sparql.ast.eval.ASTEvalHelper=false
log4j.appender.sparqlLog=org.apache.log4j.ConsoleAppender
#log4j.appender.sparqlLog=org.apache.log4j.FileAppender
log4j.appender.sparqlLog.Threshold=ALL
log4j.appender.sparqlLog.File=sparql.txt
log4j.appender.sparqlLog.Append=true
# I find that it is nicer to have this unbuffered since you can see what
# is going on and to make sure that I have complete rule evaluation logs
# on shutdown.
log4j.appender.sparqlLog.BufferedIO=false
log4j.appender.sparqlLog.layout=org.apache.log4j.PatternLayout
log4j.appender.sparqlLog.layout.ConversionPattern=#----------%d-----------tx=%X{tx}\n%m\n