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PORestlet restarting internal http client over and over again
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copied!<p>I am using Restlet 2.1 RC 4 with <code>org.restlet.ext.httpclient</code>, <code>org.restlet.ext.jackson</code> and <code>org.restlet.ext.json</code> getting Data from a remote server. However, For just 6 Objects it takes 6 seconds over wireless data connection in the house.</p> <p>As you can see, besides the GC there are many messages like <code>Starting the internal [HTTP/1.1] client</code> and <code>Stopping the internal[HTTP/1.1] client</code>. This corresponds to the large GC going on which takes so much time.</p> <pre><code>06-01 03:21:46.913: RestletTrip(2653): Querying: [SOMEURL/SOMENUMBER] 06-01 03:21:46.933: I/org.restlet(2653): Starting the internal [HTTP/1.1] client 06-01 03:21:47.053: D/dalvikvm(2653): GC_CONCURRENT freed 708K, 34% free 9214K/13831K, external 576K/1020K, paused 3ms+3ms 06-01 03:21:47.053: I/org.restlet(2653): Stopping the internal[HTTP/1.1] client 06-01 03:21:47.103: D/dalvikvm(2653): GC_FOR_MALLOC freed 4924K, 61% free 5523K/13831K, external 576K/1020K, paused 31ms 06-01 03:21:47.173: D/dalvikvm(2653): GC_CONCURRENT freed 95K, 53% free 6574K/13831K, external 576K/1020K, paused 2ms+3ms 06-01 03:21:47.253: D/dalvikvm(2653): GC_CONCURRENT freed 46K, 43% free 8012K/13831K, external 576K/1020K, paused 2ms+3ms 06-01 03:21:47.734: I/global(2653): Loaded time zone names for en_US in 397ms. 06-01 03:21:48.014: RestletTrip(2653): Querying: [SOMEURL/SOMENUMBER] 06-01 03:21:48.124: D/dalvikvm(2653): GC_CONCURRENT freed 1225K, 38% free 8688K/13831K, external 576K/1020K, paused 3ms+3ms 06-01 03:21:48.124: I/org.restlet(2653): Stopping the internal[HTTP/1.1] client 06-01 03:21:48.134: I/org.restlet(2653): Starting the internal [HTTP/1.1] client 06-01 03:21:48.184: D/dalvikvm(2653): GC_FOR_MALLOC freed 5022K, 62% free 5341K/13831K, external 576K/1020K, paused 31ms 06-01 03:21:48.244: D/dalvikvm(2653): GC_CONCURRENT freed 96K, 55% free 6307K/13831K, external 576K/1020K, paused 2ms+3ms 06-01 03:21:48.314: D/dalvikvm(2653): GC_CONCURRENT freed 44K, 45% free 7663K/13831K, external 576K/1020K, paused 3ms+4ms 06-01 03:21:48.795: I/global(2653): Loaded time zone names for en_US in 405ms. 06-01 03:21:49.015: D/dalvikvm(2653): GC_CONCURRENT freed 695K, 37% free 8736K/13831K, external 576K/1020K, paused 3ms+3ms 06-01 03:21:49.155: RestletTrip(2653): Querying: [SOMEURL/SOMENUMBER] 06-01 03:21:49.165: I/org.restlet(2653): Starting the internal [HTTP/1.1] client 06-01 03:21:49.225: D/dalvikvm(2653): GC_FOR_MALLOC freed 672K, 30% free 9778K/13831K, external 576K/1020K, paused 34ms 06-01 03:21:49.225: I/org.restlet(2653): Stopping the internal[HTTP/1.1] client 06-01 03:21:49.265: D/dalvikvm(2653): GC_FOR_MALLOC freed 4902K, 61% free 5637K/14343K, external 576K/1020K, paused 32ms 06-01 03:21:49.325: D/dalvikvm(2653): GC_CONCURRENT freed 97K, 54% free 6703K/14343K, external 576K/1020K, paused 3ms+4ms 06-01 03:21:49.395: D/dalvikvm(2653): GC_CONCURRENT freed 54K, 44% free 8167K/14343K, external 576K/1020K, paused 3ms+3ms 06-01 03:21:49.876: I/global(2653): Loaded time zone names for en_US in 407ms. 06-01 03:21:50.136: RestletTrip(2653): Querying: [SOMEURL/SOMENUMBER] 06-01 03:21:50.156: I/org.restlet(2653): Starting the internal [HTTP/1.1] client 06-01 03:21:50.236: D/dalvikvm(2653): GC_CONCURRENT freed 1295K, 38% free 8905K/14343K, external 576K/1020K, paused 3ms+4ms 06-01 03:21:50.236: I/org.restlet(2653): Stopping the internal[HTTP/1.1] client 06-01 03:21:50.286: D/dalvikvm(2653): GC_FOR_MALLOC freed 4991K, 61% free 5636K/14343K, external 576K/1020K, paused 32ms 06-01 03:21:50.346: D/dalvikvm(2653): GC_CONCURRENT freed 52K, 53% free 6748K/14343K, external 576K/1020K, paused 2ms+4ms 06-01 03:21:50.386: D/dalvikvm(2653): GC_FOR_MALLOC freed 50K, 43% free 8249K/14343K, external 576K/1020K, paused 30ms 06-01 03:21:50.867: I/global(2653): Loaded time zone names for en_US in 400ms. 06-01 03:21:51.107: RestletTrip(2653): Querying: [SOMEURL/SOMENUMBER] 06-01 03:21:51.127: I/org.restlet(2653): Starting the internal [HTTP/1.1] client 06-01 03:21:51.207: D/dalvikvm(2653): GC_CONCURRENT freed 1290K, 38% free 9006K/14343K, external 576K/1020K, paused 2ms+4ms 06-01 03:21:51.207: I/org.restlet(2653): Stopping the internal[HTTP/1.1] client 06-01 03:21:51.257: D/dalvikvm(2653): GC_FOR_MALLOC freed 4937K, 60% free 5791K/14343K, external 576K/1020K, paused 32ms 06-01 03:21:51.317: D/dalvikvm(2653): GC_CONCURRENT freed 106K, 52% free 6900K/14343K, external 576K/1020K, paused 2ms+4ms 06-01 03:21:51.387: D/dalvikvm(2653): GC_CONCURRENT freed 54K, 42% free 8448K/14343K, external 576K/1020K, paused 3ms+4ms 06-01 03:21:51.868: I/global(2653): Loaded time zone names for en_US in 406ms. 06-01 03:21:52.118: RestletTrip(2653): Querying: [SOMEURL/SOMENUMBER] 06-01 03:21:52.128: I/org.restlet(2653): Starting the internal [HTTP/1.1] client 06-01 03:21:52.218: D/dalvikvm(2653): GC_CONCURRENT freed 1297K, 36% free 9198K/14343K, external 576K/1020K, paused 3ms+3ms 06-01 03:21:52.218: I/org.restlet(2653): Stopping the internal[HTTP/1.1] client </code></pre> <p>The code I use is (stripped for faster understanding):</p> <pre><code>public List<Trip> getTrips() { // All the ids for the different trips List<Long> ids = new ArrayList<Long>; ids.add(new Long(14)); ids.add(new Long(45)); ids.add(new Long(34)); ids.add(new Long(11)); ids.add(new Long(33)); ids.add(new Long(17)); // All the Trips List<Trip> result = new ArrayList<Trip>(); for (Long tripID : ids) { Trip trip = getTrip(tripID); // Add trip to the list if (trip != null) { result.add(trip); } } return result; } public Trip getTrip(ISettings settings, Long tripID) throws GetTripException, NoSuchElementException { // Create resource final TripsResource tripResource = getClientResource(ServerPaths.getTrip(tripID), TripsResource.class); // Get trip from server return tripResource.getTrip(); } </code></pre> <p>The engine setup I am using is</p> <pre><code>import org.restlet.engine.Engine; import org.restlet.ext.httpclient.HttpClientHelper; import org.restlet.ext.jackson.JacksonConverter; import org.restlet.ext.json.JsonConverter; import org.restlet.Client; import org.restlet.data.Protocol; protected void setupEngine() { final Engine engine = Engine.getInstance(); engine.getRegisteredClients().add(new HttpClientHelper(new Client(Protocol.HTTP))); engine.getRegisteredConverters().add(new JacksonConverter()); engine.getRegisteredConverters().add(new JsonConverter()); } </code></pre> <p>So, the retrieval is so slow due to the GC. How can I improve the performance?</p>

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