# Client.get() timeout after a couple of requests **URL:** \ **Category:** Java Client\ **Created:** [July 8, 2016, 2:08pm UTC](https://discuss.aerospike.com/t/client-get-timeout-after-a-couple-of-requests/3143 "2016-07-08T14:08:49Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![kromg](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/kromg/32/522_2.png) [@kromg](https://discuss.aerospike.com/u/kromg)\ **Post date:** [July 8, 2016, 2:08pm UTC](https://discuss.aerospike.com/t/client-get-timeout-after-a-couple-of-requests/3143/1 "2016-07-08T14:08:49Z")
Hi, I am evaluating aerospike for a realtime, hi throughput application. Basically, I have a 2-node cluster with a pair of java applications writing data into aerospike as they come in from a high volume data stream, and then a third application will expose these data via a RESTful interface. I made a simple application to keep querying the same key over and over again, to test performances, but I can get just the first two replies, then the third loop will get stuck (indefinitely): ``` public class QueryKey { public static void main(String[] args) throws PropertyException { // Some initialization here... QueryKey qk = new QueryKey(args); qk.query(); qk.close(); } final String ns; final String set; final String key; final AerospikeClient ac; public QueryKey(final String[] args) throws PropertyException { this.ns = args[0]; this.set = args[1]; this.key = args[2]; ClientPolicy policy = new ClientPolicy(); policy.timeout = 3000; policy.maxConnsPerNode = 1; policy.readPolicyDefault.timeout = 3000; this.ac = new AerospikeClient( policy, new Host[] { new Host("10.0.0.11", 3000), new Host("10.0.0.12", 3000) } ); } public void query() { long reqNo = 1; long before = 0; while (true) { before = System.currentTimeMillis(); System.out.println("Req: " + reqNo++ + " -- " + before); Record r = ac.get(null, new Key(ns, set, key)); for (String k : r.bins.keySet()) { System.out.println(k + " => " + new String( (byte[]) r.bins.get(k), Charset.forName("UTF-8"))); } System.out.println("Req exc time: " + (System.currentTimeMillis() - before) + "ms"); } } public void close() { ac.close(); } } ``` The output stops on the third request: ``` Req: 1 -- 1467986439188 [various key => value pairs...] Req exc time: 35ms Req: 2 -- 1467986439223 [various key => value pairs...] Req exc time: 19ms Req: 3 -- 1467986439242 Exception in thread "main" com.aerospike.client.AerospikeException$Timeout: Client timeout: timeout=3000 iterations=1 failedNodes=0 failedConns=0 lastNode=BB9000100000001 10.0.0.11:3000 at com.aerospike.client.command.SyncCommand.execute(SyncCommand.java:86) at com.aerospike.client.AerospikeClient.get(AerospikeClient.java:508) at it.webank.info.cache.feeder.test.QueryKey.query(QueryKey.java:71) at it.webank.info.cache.feeder.test.QueryKey.main(QueryKey.java:26) ``` **EDIT:** if I change slightly the loop it clearly shows that 2 requests go well, and 2 fail, alternatively: ``` public void query() { long reqNo = 1; long before = 0; Record r = null; while (true) { try { before = System.currentTimeMillis(); log("Req: " + reqNo++ + " -- " + before); r = ac.get(null, new Key(ns, set, key)); log("Req exc time: " + (System.currentTimeMillis() - before) + "ms"); } catch (Exception e) { log("BOOM! " + e.getMessage()); } } } ``` output: ``` Req: 1 -- 1467987976901 Req exc time: 25ms Req: 2 -- 1467987976926 Req exc time: 6ms Req: 3 -- 1467987976933 BOOM! Client timeout: timeout=300 iterations=1 failedNodes=0 failedConns=0 lastNode=BB9000100000001 10.0.0.11:3000 Req: 4 -- 1467987977234 BOOM! Client timeout: timeout=300 iterations=1 failedNodes=0 failedConns=0 lastNode=BB9000200000002 10.0.0.12:3000 Req: 5 -- 1467987977535 Req exc time: 6ms Req: 6 -- 1467987977541 Req exc time: 6ms Req: 7 -- 1467987977547 BOOM! Client timeout: timeout=300 iterations=1 failedNodes=0 failedConns=0 lastNode=BB9000100000001 10.0.0.11:3000 Req: 8 -- 1467987977848 BOOM! Client timeout: timeout=300 iterations=1 failedNodes=0 failedConns=0 lastNode=BB9000200000002 10.0.0.12:3000 Req: 9 -- 1467987978149 Req exc time: 5ms Req: 10 -- 1467987978154 Req exc time: 7ms Req: 11 -- 1467987978161 BOOM! Client timeout: timeout=300 iterations=1 failedNodes=0 failedConns=0 lastNode=BB9000100000001 10.0.0.11:3000 Req: 12 -- 1467987978462 BOOM! Client timeout: timeout=300 iterations=1 failedNodes=0 failedConns=0 lastNode=BB9000200000002 10.0.0.12:3000 [...] ``` Am I missing something? Is there the need to release some resources? The execution times of the first two requests would be good… Thanks, Giacomo ---
**Author:** ![Brian](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/brian/32/2211_2.png) [@Brian](https://discuss.aerospike.com/u/Brian)\ **Post date:** [July 8, 2016, 6:55pm UTC](https://discuss.aerospike.com/t/client-get-timeout-after-a-couple-of-requests/3143/2 "2016-07-08T18:55:59Z")
Although “maxConnsPerNode=1” should technically work for your test case, I suggest using the default “maxConnsPerNode=300” instead and see if that makes a difference. ---
**Author:** ![kromg](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/kromg/32/522_2.png) [@kromg](https://discuss.aerospike.com/u/kromg)\ **Post date:** [July 11, 2016, 7:56am UTC](https://discuss.aerospike.com/t/client-get-timeout-after-a-couple-of-requests/3143/3 "2016-07-11T07:56:56Z")
Hi Brian, thanks for you reply. I tried with many different values for maxConnsPerNode but nothing changed. I noticed that in every case no more than two or three connections were made towards the servers, and the connections kept changing, so I suspected a network issue. I tried to run the client directly on one of the servers, and got no problems even at “maxConnsPerNode = 1”, so I suppose it’s a networking issue between the host I was using as client and the servers, I will investigate this further. Thanks, Giacomo