调用Elastic搜索集群时获取ConnectionPoolTimeoutException

如何解决调用Elastic搜索集群时获取ConnectionPoolTimeoutException

我们在调用弹性搜索以获取更新和获取查询时收到ConnectionPoolTimeoutException。我们正在使用AWS弹性搜索服务。我们正在使用Jest客户端，配置如下。

public final class JestClientFactory {

    private JestClientFactory() {
    }

    public static final int READ_TIME_OUT = 60000;
    public static final int MAX_TOTAL_CONNS = 40;
    public static final int DEFAULT_MAX_TOTAL_CONNECTION_PER_ROUTE = 4;

    public static JestClient getClient(final String esEndpoint,final String awsRegion,final String odinMaterialSet) {
        final HttpClientConfig httpClientConfig = new HttpClientConfig.Builder(esEndpoint)
                                                                      .multiThreaded(true)
                                                                      .readTimeout(READ_TIME_OUT)
                                                                      .defaultMaxTotalConnectionPerRoute(DEFAULT_MAX_TOTAL_CONNECTION_PER_ROUTE)
                                                                      .maxTotalConnection(MAX_TOTAL_CONNS)
                                                                      .build();

        final AESClientFactory aesClientFactory = new AESClientFactory(getAwsCredentialsProvier(odinMaterialSet),awsRegion);
        aesClientFactory.setHttpClientConfig(httpClientConfig);
        final JestClient jestClient = aesClientFactory.getobject();
        return jestClient;
    }

    private static AWSCredentialsProvider getAwsCredentialsProvier(final String odinMaterialSetValue) {
        return new OdinAWSCredentialsProvider(odinMaterialSetValue);
    }
}

完整的错误日志如下-

application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz:Caused by: org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.leaseConnection(PoolingHttpClientConnectionManager.java:314) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$1.get(PoolingHttpClientConnectionManager.java:280) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:190) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108) ~[Apache-HttpComponents-HttpClient-4.5.x.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at io.searchBox.client.http.JestHttpClient.executeRequest(JestHttpClient.java:109) ~[Jest-2.0.3.jar:?]
application.log.2020-08-06-16.es-analytics-eu-prod-1a-1106f343.eu-west-1.amazon.com.gz: at io.searchBox.client.http.JestHttpClient.execute(JestHttpClient.java:56) ~[Jest-2.0.3.jar:?]

1. 任何人都可以帮助提供更好的配置详细信息，以及如何避免这种异常？
2. 也无法找到defaultMaxTotalConnectionPerRoute的含义。请提供有关此信息。