amazon dynamodb - Composite index in Titan Dynamo DB won't work -

so i'm trying make composite index on titan backed dynamo db , throws exception.

the main error hash primary key values must under 2048 bytes, , range primary key values must under 1024 bytes.

com.thinkaurelius.titan.core.titanexception: not commit transaction due exception during persistence      @ com.thinkaurelius.titan.graphdb.transaction.standardtitantx.commit(standardtitantx.java:1363)     @ com.thinkaurelius.titan.graphdb.tinkerpop.titanblueprintsgraph$graphtransaction.docommit(titanblueprintsgraph.java:263)     @ org.apache.tinkerpop.gremlin.structure.util.abstracttransaction.commit(abstracttransaction.java:94)     @ org.apache.tinkerpop.gremlin.structure.transaction$commit.call(unknown source)     @ org.codehaus.groovy.runtime.callsite.callsitearray.defaultcall(callsitearray.java:45)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.call(abstractcallsite.java:110)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.call(abstractcallsite.java:114)     @ com.kapsoft.isportsdb.parsers.baseball.retrosheetdataparser$_parseteamsandaddtograph_closure5$_closure10.docall(retrosheetdataparser.groovy:675)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:498)     @ org.codehaus.groovy.reflection.cachedmethod.invoke(cachedmethod.java:90)     @ groovy.lang.metamethod.domethodinvoke(metamethod.java:324)     @ org.codehaus.groovy.runtime.metaclass.closuremetaclass.invokemethod(closuremetaclass.java:292)     @ groovy.lang.metaclassimpl.invokemethod(metaclassimpl.java:1016)     @ groovy.lang.closure.call(closure.java:423)     @ groovy.lang.closure.call(closure.java:439)     @ org.codehaus.groovy.runtime.defaultgroovymethods.each(defaultgroovymethods.java:2027)     @ org.codehaus.groovy.runtime.dgm$161.invoke(unknown source)     @ org.codehaus.groovy.runtime.callsite.pojometamethodsite$pojometamethodsitenounwrapnocoerce.invoke(pojometamethodsite.java:271)     @ org.codehaus.groovy.runtime.callsite.pojometamethodsite.call(pojometamethodsite.java:53)     @ org.codehaus.groovy.runtime.callsite.callsitearray.defaultcall(callsitearray.java:45)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.call(abstractcallsite.java:110)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.call(abstractcallsite.java:122)     @ com.kapsoft.isportsdb.parsers.baseball.retrosheetdataparser$_parseteamsandaddtograph_closure5.docall(retrosheetdataparser.groovy:637)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:498)     @ org.codehaus.groovy.reflection.cachedmethod.invoke(cachedmethod.java:90)     @ groovy.lang.metamethod.domethodinvoke(metamethod.java:324)     @ org.codehaus.groovy.runtime.metaclass.closuremetaclass.invokemethod(closuremetaclass.java:292)     @ groovy.lang.metaclassimpl.invokemethod(metaclassimpl.java:1016)     @ groovy.lang.closure.call(closure.java:423)     @ groovy.lang.closure.call(closure.java:439)     @ org.codehaus.groovy.runtime.defaultgroovymethods.each(defaultgroovymethods.java:2027)     @ org.codehaus.groovy.runtime.defaultgroovymethods.each(defaultgroovymethods.java:2012)     @ org.codehaus.groovy.runtime.defaultgroovymethods.each(defaultgroovymethods.java:2053)     @ org.codehaus.groovy.runtime.dgm$162.invoke(unknown source)     @ org.codehaus.groovy.runtime.callsite.pojometamethodsite$pojometamethodsitenounwrapnocoerce.invoke(pojometamethodsite.java:271)     @ org.codehaus.groovy.runtime.callsite.pojometamethodsite.call(pojometamethodsite.java:53)     @ org.codehaus.groovy.runtime.callsite.callsitearray.defaultcall(callsitearray.java:45)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.call(abstractcallsite.java:110)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.call(abstractcallsite.java:122)     @ com.kapsoft.isportsdb.parsers.baseball.retrosheetdataparser.parseteamsandaddtograph(retrosheetdataparser.groovy:635)     @ com.kapsoft.isportsdb.parsers.baseball.retrosheetdataparser$parseteamsandaddtograph$7.callcurrent(unknown source)     @ org.codehaus.groovy.runtime.callsite.callsitearray.defaultcallcurrent(callsitearray.java:49)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.callcurrent(abstractcallsite.java:151)     @ org.codehaus.groovy.runtime.callsite.abstractcallsite.callcurrent(abstractcallsite.java:171)     @ com.kapsoft.isportsdb.parsers.baseball.retrosheetdataparser.parse(retrosheetdataparser.groovy:103)     @ com.kapsoft.isportsdb.parsers.baseball.retrosheetdataparsertest.testparse(retrosheetdataparsertest.java:19)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:498)     @ org.junit.runners.model.frameworkmethod$1.runreflectivecall(frameworkmethod.java:44)     @ org.junit.internal.runners.model.reflectivecallable.run(reflectivecallable.java:15)     @ org.junit.runners.model.frameworkmethod.invokeexplosively(frameworkmethod.java:41)     @ org.junit.internal.runners.statements.invokemethod.evaluate(invokemethod.java:20)     @ org.junit.internal.runners.statements.runbefores.evaluate(runbefores.java:28)     @ org.junit.internal.runners.statements.runafters.evaluate(runafters.java:31)     @ org.junit.runners.blockjunit4classrunner.runchild(blockjunit4classrunner.java:73)     @ org.junit.runners.blockjunit4classrunner.runchild(blockjunit4classrunner.java:46)     @ org.junit.runners.parentrunner.runchildren(parentrunner.java:180)     @ org.junit.runners.parentrunner.access$000(parentrunner.java:41)     @ org.junit.runners.parentrunner$1.evaluate(parentrunner.java:173)     @ org.junit.internal.runners.statements.runbefores.evaluate(runbefores.java:28)     @ org.junit.internal.runners.statements.runafters.evaluate(runafters.java:31)     @ org.junit.runners.parentrunner.run(parentrunner.java:220)     @ org.junit.runner.junitcore.run(junitcore.java:137)     @ com.intellij.junit4.junit4ideatestrunner.startrunnerwithargs(junit4ideatestrunner.java:117)     @ com.intellij.rt.execution.junit.junitstarter.preparestreamsandstart(junitstarter.java:234)     @ com.intellij.rt.execution.junit.junitstarter.main(junitstarter.java:74)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:498)     @ com.intellij.rt.execution.application.appmain.main(appmain.java:144) caused by: com.thinkaurelius.titan.core.titanexception: not execute operation due backend exception     @ com.thinkaurelius.titan.diskstorage.util.backendoperation.execute(backendoperation.java:44)     @ com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.cachetransaction.persist(cachetransaction.java:87)     @ com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.cachetransaction.flushinternal(cachetransaction.java:141)     @ com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.cachetransaction.commit(cachetransaction.java:198)     @ com.thinkaurelius.titan.diskstorage.backendtransaction.commitstorage(backendtransaction.java:118)     @ com.thinkaurelius.titan.graphdb.database.standardtitangraph.commit(standardtitangraph.java:718)     @ com.thinkaurelius.titan.graphdb.transaction.standardtitantx.commit(standardtitantx.java:1352)     ... 78 more caused by: com.thinkaurelius.titan.diskstorage.permanentbackendexception: updateitem_v100_graphindex hash primary key values must under 2048 bytes, , range primary key values must under 1024 bytes (service: amazondynamodbv2; status code: 400; error code: validationexception; request id: 608064c5-746c-4f7f-95e9-6d9a382d08eb)     @ com.amazon.titan.diskstorage.dynamodb.dynamodbdelegate.processdynamodbapiexception(dynamodbdelegate.java:213)     @ com.amazon.titan.diskstorage.dynamodb.dynamodbdelegate.updateitem(dynamodbdelegate.java:515)     @ com.amazon.titan.diskstorage.dynamodb.exponentialbackoff$updateitem.call(exponentialbackoff.java:91)     @ com.amazon.titan.diskstorage.dynamodb.exponentialbackoff$updateitem.call(exponentialbackoff.java:84)     @ com.amazon.titan.diskstorage.dynamodb.exponentialbackoff.runwithbackoff(exponentialbackoff.java:158)     @ com.amazon.titan.diskstorage.dynamodb.mutation.updateitemworker.call(updateitemworker.java:40)     @ com.amazon.titan.diskstorage.dynamodb.mutation.updateitemworker.call(updateitemworker.java:27)     @ java.util.concurrent.futuretask.run(futuretask.java:266)     @ java.util.concurrent.executors$runnableadapter.call(executors.java:511)     @ java.util.concurrent.futuretask.run(futuretask.java:266)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1142)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:617)     @ java.lang.thread.run(thread.java:745) caused by: com.amazonaws.amazonserviceexception: hash primary key values must under 2048 bytes, , range primary key values must under 1024 bytes (service: amazondynamodbv2; status code: 400; error code: validationexception; request id: 608064c5-746c-4f7f-95e9-6d9a382d08eb)     @ com.amazonaws.http.amazonhttpclient.handleerrorresponse(amazonhttpclient.java:1275)     @ com.amazonaws.http.amazonhttpclient.executeonerequest(amazonhttpclient.java:873)     @ com.amazonaws.http.amazonhttpclient.executehelper(amazonhttpclient.java:576)     @ com.amazonaws.http.amazonhttpclient.doexecute(amazonhttpclient.java:362)     @ com.amazonaws.http.amazonhttpclient.executewithtimer(amazonhttpclient.java:328)     @ com.amazonaws.http.amazonhttpclient.execute(amazonhttpclient.java:307)     @ com.amazonaws.services.dynamodbv2.amazondynamodbclient.invoke(amazondynamodbclient.java:1818)     @ com.amazonaws.services.dynamodbv2.amazondynamodbclient.updateitem(amazondynamodbclient.java:1632)     @ com.amazon.titan.diskstorage.dynamodb.dynamodbdelegate.updateitem(dynamodbdelegate.java:513)     ... 11 more 

so guess index doesn't allow value more 2048 bytes?