Hi all,
kylin version:1.5.0
1): The jdbc driver bug(kylin's server shutdown).
I have a Cube with ten million rows. if i execute SQL statement
with kylin's jdbc driver. but whithout 'limit' (sql for example: select * from
tablename). It query all data returned. and kylin's server shutdown. there’s
a warning log as followed, which not sure be the reason:
sizeof.ObjectGraphWalker:209 : The configured limit of 1,000 object references
was reached while attempting to calculate the size of the object graph.
Severe performance degradation could occur if the sizing operation continues.
This can be avoided by setting the CacheManger or Cache <sizeOfPolicy>
elements maxDepthExceededBehavior to "abort" or
adding stop points with @IgnoreSizeOf annotations. If performance degradation
is NOT an issue at the configured limit,
raise the limit value using the CacheManager or Cache <sizeOfPolicy> elements
maxDepth attribute.
2): The cache bug.
First: I executed sql:'select * from tablename limit 1000'; the result
: 1000 rows.
Second : I executed sql:'select * from tablename limit 4000'; the
result : 1001 rows.
why ???
