All,
About two days ago, two of our HANA instances mysteriously started getting the following error when attempting to access the Catalog through HANA Studio:
SAP DBTech JDBC: [3584]: distributed SQL error: [2617] executor: plan operation execution failed with exception failed with an exception
I connected to the HANA box and checked the logs...but there's nothing to see there it seems. When I go into the system detail tabs like "landscape", "alerts" etc I get the following error:
- SAP DBTech JDBC: [3584]: distributed SQL error: [2617] executor: plan operation execution failed with an exception (com.sap.db.jdbc.exceptions.JDBCDriverException: SAP DBTech JDBC: [3584]: distributed SQL error: [2617] executor: plan operation execution failed with an exception)
I clicked on the performance tab and saw the following:
- SAP DBTech JDBC: [3587]: invalid protocol or indexserver (statisticsserver) shutdown during distributed query execution: [2613] executor: communication problem (com.sap.db.jdbc.exceptions.JDBCDriverException: SAP DBTech JDBC: [3587]: invalid protocol or indexserver (statisticsserver) shutdown during distributed query execution: [2613] executor: communication problem)
Any ideas? We were happily in-memory computing along and the next day we were hosed. I've created a new AWS HANA instance and connected from the same network/laptop/HANA Studio software and all is well...so it's not me 
Help?!!? Please...
Thanks all...
Tim