The SAP connector uses the SAP JCo library to communicate with SAP systems.
The SAP connector needs to retrieve metadata for the BAPIs and RFMs on the SAP Application Server. The connector uses the repository object in JCo.
The JCo repository object maintains its connection to the SAP system. The repository object caches the metadata that it receives from the SAP Application Server. For this reason, there is always one connection open to the SAP system once an endpoint is acquired.
When you use the SAP connector to manage an account, Java CS opens a second connection to the SAP Application Server. To maintain high performance, Java CS manages this connection using its own pooling mechanism.
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