Xstore hangs and restarts after sometime.

Hi All,

I've been struggling for the last one week in some issue. First we are using xsotre 15.0.0.459 , the issue is i am trying to pull a document from xcenter to store with around 530 lines and around 5000 QTY. the xstore hangs and restarts after 2 to 3 minutes .i was getting store-primary offline, and xcenter online, i resolved the store-primary now i am getting xcenter offline, other error from the log is out of memory Java Heap Space, when increasing the initial size to 2048m and max size to 4096m i am getting overhead limit exceeded , OK.

other error is can not retry due server authentication, in streaming mode. bellow is the error.