Freezer close database after every operation

[allenz8512]

Which may cause "java.lang.IllegalStateException: attempt to re-open an already-closed object." or "java.lang.IllegalStateException: Cannot perform this operation because the connection pool has been closed."

[allenz8512]

Work well on single thread, but it has chance to throw when using multithread access database

[florent37]

mmm I don't know how to handle it, any idea ?

[graphee-gabriel]

#28 might have fixed this issue if you use add(List<Object> objects) instead of many add(Object object)