Spring Boot + AWS Linux + Oracle 数据库

Question

I have developed Spring Boot REST API with JPA on AWS Linux with Oracle11g as database, as we are dealing with Spring boot we don't have to take care of connections.

netstat -n | grep 1521   

When I fired this command to check whether all connections are closed or not, I can see many connections are in CLOSE_WAIT state.
Can anyone suggest whether what is wrong in application or configuration of Tomcat or Apache?

application.properties

spring.datasource.remove-abandoned=true  
spring.datasource.remove-abandoned-timeout=30  
spring.datasource.max-active=50  
spring.datasource.max-idle=8  
spring.datasource.min-idle=8  
spring.datasource.initial-size=10  
spring.datasource.max-wait=10000

Answer 1

The issue's been the fact the HttpResponse hasn't been closed, to fix this I've used HttpClientUtils.closeQuietly, see below :

HttpResponse response = null;
    try {
        response = client.execute(createHttpRequest(url, timeOut));
        StringBuilder result = new StringBuilder();
        try (BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()))) {
            String line;
            while ((line = rd.readLine()) != null) {
                result.append(line);
            }
        }
        return result;
    } catch (org.apache.http.conn.HttpHostConnectException e) {
        throw new HostUnreachableException(e);
    } finally {
        HttpClientUtils.closeQuietly(response);
    }