in flink-connector-opensearch/src/main/java/org/apache/flink/streaming/connectors/opensearch/OpensearchSink.java [363:377]
public void close() throws Exception {
opensearchSinkFunction.close();
if (bulkProcessor != null) {
bulkProcessor.close();
bulkProcessor = null;
}
if (client != null) {
client.close();
client = null;
}
// make sure any errors from callbacks are rethrown
checkErrorAndRethrow();
}