Query runs for couple of hours regardless of timeout set to 300

Hi,

I am using pentaho 5.0 CE with saiku plugin. This is how mondrian.properties look like:

# Allow the use of aggregates
mondrian.rolap.aggregates.Use=true
mondrian.rolap.aggregates.Read=true

# mondrian.properties
mondrian.result.limit=5000000

######################################################################
# Integer property indicating timeout value, in seconds, for queries.
# Default of 0 indicates no timeout
mondrian.rolap.queryTimeout=300

# Property which controls the amount of tracing displayed. Seperate from log4j.
mondrian.trace.level=0

# Maximum number of simultaneous queries the system will allow.
mondrian.query.limit=40

# Property which determines when a dimension is considered "large".
mondrian.rolap.LargeDimensionThreshold=100

# Boolean property that controls whether a RolapStar's aggregate data cache is cleared after each query.
mondrian.rolap.star.disableCaching=false

# Boolean property which controls SQL pretty-print mode.
mondrian.rolap.generate.formatted.sql=false

# Boolean property which controls whether the MDX parser resolves uses case-sensitive matching when looking up identifiers.
mondrian.olap.case.sensitive=true

# Boolean property which controls whether to use a cache for frequently evaluated expressions.
mondrian.expCache.enable=true

# if enabled some NON EMPTY CrossJoin will be computed in SQL
mondrian.native.crossjoin.enable=true

# if enabled some TopCount will be computed in SQL
mondrian.native.topcount.enable=true

# if enabled some Filter() will be computed in SQL
mondrian.native.filter.enable=true

# some NON EMPTY set operations like member.children, level.members and member descendants will be computed in SQL
mondrian.native.nonempty.enable=true

# enable grouping sets, if the dialect supports it.
mondrian.rolap.groupingsets.enable=true

# Max number of constraints in a single `IN' SQL clause.
mondrian.rolap.maxConstraints=10000

# Property which defines the maximum number of passes allowable while evaluating an MDX expression.
mondrian.rolap.evaluate.MaxEvalDepth=10


Regardless of mondrian.rolap.queryTimeout property set correctly, few queries run for a long time. Some of them DO get time out if I re-try.

How can I debug this issue further.

Thanks,