diff --git a/elx-http/src/main/java/org/xbib/elx/http/HttpAction.java b/elx-http/src/main/java/org/xbib/elx/http/HttpAction.java
index 6dcb579..f3906dc 100644
--- a/elx-http/src/main/java/org/xbib/elx/http/HttpAction.java
+++ b/elx-http/src/main/java/org/xbib/elx/http/HttpAction.java
@@ -166,6 +166,8 @@ public abstract class HttpAction<R extends ActionRequest, T extends ActionRespon
         } catch (Throwable e) {
             // catch all kinds of errors in the entity parsing process
             logger.error(e.getMessage(), e);
+            logger.error("status = " + httpActionContext.getHttpResponse().getStatus().getCode());
+            logger.error("body = " + httpActionContext.getHttpResponse().getBodyAsString(StandardCharsets.UTF_8));
             return null;
         }
     }
diff --git a/elx-http/src/main/java/org/xbib/elx/http/HttpClientHelper.java b/elx-http/src/main/java/org/xbib/elx/http/HttpClientHelper.java
index dfeb0bf..be64ea5 100644
--- a/elx-http/src/main/java/org/xbib/elx/http/HttpClientHelper.java
+++ b/elx-http/src/main/java/org/xbib/elx/http/HttpClientHelper.java
@@ -68,10 +68,10 @@ public class HttpClientHelper {
         if (settings.hasValue("url")) {
             this.url = settings.get("url");
             httpAddress = HttpAddress.http1(this.url);
-        } else if (settings.hasValue("host") && settings.hasValue("post")) {
-            URL u =  URL.http()
-                    .host(settings.get("host")).port(settings.getAsInt("port", 9200))
-                    .build();
+        } else if (settings.hasValue("host")) {
+            // use only first host
+            URL u = findAddresses(settings).stream().findFirst()
+                    .orElseGet(() -> URL.http().host("localhost").port(9200).build());
             httpAddress = HttpAddress.http1(u);
             this.url = u.toExternalForm();
         } else {
@@ -151,4 +151,27 @@ public class HttpClientHelper {
             logger.error(e.getMessage(), e);
         }
     }
+
+
+    private List<URL> findAddresses(Settings settings) {
+        final int defaultPort = settings.getAsInt("port", 9200);
+        List<URL> addresses = new ArrayList<>();
+        for (String hostname : settings.getAsList("host")) {
+            String[] splitHost = hostname.split(":", 2);
+            if (splitHost.length == 2) {
+                try {
+                    String host = splitHost[0];
+                    int port = Integer.parseInt(splitHost[1]);
+                    addresses.add(URL.from("http://" + host + ":" + port));
+                } catch (NumberFormatException e) {
+                    logger.warn(e.getMessage(), e);
+                }
+            }
+            if (splitHost.length == 1) {
+                String host = splitHost[0];
+                addresses.add(URL.from("http://" + host + ":" + defaultPort));
+            }
+        }
+        return addresses;
+    }
 }
diff --git a/elx-http/src/test/java/org/xbib/elx/http/test/DumpIDTest.java b/elx-http/src/test/java/org/xbib/elx/http/test/DumpIDTest.java
new file mode 100644
index 0000000..edc2508
--- /dev/null
+++ b/elx-http/src/test/java/org/xbib/elx/http/test/DumpIDTest.java
@@ -0,0 +1,42 @@
+package org.xbib.elx.http.test;
+
+import org.elasticsearch.index.query.QueryBuilders;
+import org.junit.jupiter.api.Test;
+import org.xbib.elx.api.IndexDefinition;
+import org.xbib.elx.common.ClientBuilder;
+import org.xbib.elx.common.DefaultIndexDefinition;
+import org.xbib.elx.http.HttpSearchClient;
+import org.xbib.elx.http.HttpSearchClientProvider;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.stream.Stream;
+
+class DumpIDTest {
+
+    @Test
+    void testDump() throws Exception {
+        IndexDefinition indexDefinition = new DefaultIndexDefinition("zdb", "zdb");
+        try (HttpSearchClient searchClient = ClientBuilder.builder()
+                .setSearchClientProvider(HttpSearchClientProvider.class)
+                .put("cluster.name", "es2")
+                .put("host", "atlas:9202")
+                .put("pool.enabled", false)
+                .build();
+             BufferedWriter writer = Files.newBufferedWriter(Paths.get("zdb.txt"))) {
+            Stream<String> stream = searchClient.getIds(qb -> qb
+                            .setIndices(indexDefinition.getIndex())
+                            .setQuery(QueryBuilders.matchAllQuery()));
+            stream.forEach(id -> {
+                try {
+                    writer.write(id);
+                    writer.newLine();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            });
+        }
+    }
+}
diff --git a/elx-transport/src/test/java/org/xbib/elx/transport/test/DumpIDTest.java b/elx-transport/src/test/java/org/xbib/elx/transport/test/DumpIDTest.java
new file mode 100644
index 0000000..b6a18fd
--- /dev/null
+++ b/elx-transport/src/test/java/org/xbib/elx/transport/test/DumpIDTest.java
@@ -0,0 +1,41 @@
+package org.xbib.elx.transport.test;
+
+import org.elasticsearch.index.query.QueryBuilders;
+import org.junit.jupiter.api.Test;
+import org.xbib.elx.api.IndexDefinition;
+import org.xbib.elx.common.ClientBuilder;
+import org.xbib.elx.common.DefaultIndexDefinition;
+import org.xbib.elx.transport.TransportSearchClient;
+import org.xbib.elx.transport.TransportSearchClientProvider;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.stream.Stream;
+
+class DumpIDTest {
+
+    @Test
+    void testDump() throws Exception {
+        IndexDefinition indexDefinition = new DefaultIndexDefinition("zdb", "zdb");
+        try (TransportSearchClient searchClient = ClientBuilder.builder()
+                .setSearchClientProvider(TransportSearchClientProvider.class)
+                .put("cluster.name", "es2")
+                .put("host", "atlas:9302")
+                .build();
+             BufferedWriter writer = Files.newBufferedWriter(Paths.get("zdb.txt"))) {
+            Stream<String> stream = searchClient.getIds(qb -> qb
+                            .setIndices(indexDefinition.getIndex())
+                            .setQuery(QueryBuilders.matchAllQuery()));
+            stream.forEach(id -> {
+                try {
+                    writer.write(id);
+                    writer.newLine();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            });
+        }
+    }
+}