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Re: [geomesa-users] Errors while running KNearestNeighborSearch 
Hi Van,
As a first step, could you double check that you have the same geomesa jar version deployed everywhere in your cluster? (e.g. accumulo, geoserver, ingest, etc). Also, which geomesa version are you using?
As a second step, could you scan the geomesa catalog table for the schema that is failing, and send us the output? That should allow us to re-create the bug in a unit test. Also, could you send the XML that's getting sent to geoserver for the request? 

Thanks,

Emilio

On 07/09/2016 05:59 AM, Le Hong Van wrote:

Hello,
I'm trying to run KNearestNeighborSearch in geomesa-process (https://github.com/locationtech/geomesa/tree/master/geomesa-process) using "WPS request builder" on GeoServer but I got below error: 

Request: getServiceInfo
09 Jul 18:43:28 WARN [index.RecordIdxStrategy] - Running full table scan for schema tdrive with filter BBOX(geom, 116.30435943603516,39.930667877197266,116.30470275878906,39.93083953857422) 09 Jul 18:43:30 WARN [impl.TabletServerBatchReaderIterator] - Error on server hadoop120:9997 org.apache.accumulo.core.client.impl.AccumuloServerException: Error on server hadoop120:9997 at org.apache.accumulo.core.client.impl.TabletServerBatchReaderIterator.doLookup(TabletServerBatchReaderIterator.java:723) at org.apache.accumulo.core.client.impl.TabletServerBatchReaderIterator$QueryTask.run(TabletServerBatchReaderIterator.java:376) at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47) at org.apache.accumulo.core.util.LoggingRunnable.run(LoggingRunnable.java:34) 
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.thrift.TApplicationException: Internal error processing continueMultiScan at org.apache.thrift.TApplicationException.read(TApplicationException.java:111) at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:71) at org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Client.recv_continueMultiScan(TabletClientService.java:340) at org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Client.continueMultiScan(TabletClientService.java:326) at org.apache.accumulo.core.client.impl.TabletServerBatchReaderIterator.doLookup(TabletServerBatchReaderIterator.java:691) 
    ... 7 more

Log in the server that had error:
2016-07-09 18:43:30,460 [tserver.TabletServer] WARN : Failed to get multiscan result java.util.concurrent.ExecutionException: com.esotericsoftware.kryo.KryoException: Buffer too small: capacity: 1, required: 4 at org.apache.accumulo.tserver.TabletServer$ScanTask.get(TabletServer.java:795) at org.apache.accumulo.tserver.TabletServer$ThriftClientHandler.continueMultiScan(TabletServer.java:1459) at org.apache.accumulo.tserver.TabletServer$ThriftClientHandler.continueMultiScan(TabletServer.java:1445) 
        at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
        at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.accumulo.trace.instrument.thrift.RpcServerInvocationHandler.invoke(RpcServerInvocationHandler.java:46) at org.apache.accumulo.server.util.RpcWrapper$1.invoke(RpcWrapper.java:47) 
        at com.sun.proxy.$Proxy16.continueMultiScan(Unknown Source)
at org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Processor$continueMultiScan.getResult(TabletClientService.java:2278) at org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Processor$continueMultiScan.getResult(TabletClientService.java:2262) at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39) at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39) at org.apache.accumulo.server.util.TServerUtils$TimedProcessor.process(TServerUtils.java:168) at org.apache.thrift.server.AbstractNonblockingServer$FrameBuffer.invoke(AbstractNonblockingServer.java:516) at org.apache.accumulo.server.util.CustomNonBlockingServer$1.run(CustomNonBlockingServer.java:77) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47) at org.apache.accumulo.core.util.LoggingRunnable.run(LoggingRunnable.java:34) 
        at java.lang.Thread.run(Thread.java:745)
Caused by: com.esotericsoftware.kryo.KryoException: Buffer too small: capacity: 1, required: 4 
        at com.esotericsoftware.kryo.io.Input.require(Input.java:152)
        at com.esotericsoftware.kryo.io.Input.readInt(Input.java:325)
at org.locationtech.geomesa.features.kryo.KryoBufferSimpleFeature.setBuffer(KryoBufferSimpleFeature.scala:53) at org.locationtech.geomesa.accumulo.iterators.KryoLazyFilterTransformIterator.findTop(KryoLazyFilterTransformIterator.scala:98) at org.locationtech.geomesa.accumulo.iterators.KryoLazyFilterTransformIterator.next(KryoLazyFilterTransformIterator.scala:82) at org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.readNext(SourceSwitchingIterator.java:125) at org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.next(SourceSwitchingIterator.java:110) 
        at org.apache.accumulo.tserver.Tablet.lookup(Tablet.java:1541)
        at org.apache.accumulo.tserver.Tablet.lookup(Tablet.java:1630)
at org.apache.accumulo.tserver.TabletServer$ThriftClientHandler$LookupTask.run(TabletServer.java:1155) at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47) 
        ... 5 more

Is there any idea to solve this problem?
By the way, I tried with Point2Point query and it worked without any error. So I don't think it is a problem of accumulo configuration. 

Thank you in advance.
Van
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