Casbah(またはmongodbのJavaドライバー)は、返された多数のオブジェクトの処理に問題があるようです。たとえば、次のコードセグメントは、IllegalArgumentExceptionを生成し、単一の結果を返しません(以下の完全なスタックトレース)。ただし、「limit(...)」を1994に減らすと、すべてが正常に機能しているように見えます。
for (link <- links; query = link $exists true) {
val group = new HashMap[String, Set[(String, String)]] with MultiMap[String, (String, String)]
log.find(query, fieldsToGet.result).limit(1996) foreach {
x => {
group.addBinding(x.get(link).toString, (x.get("_id").toString(), x.get("eventType").toString))
}
}
allGroups += link -> group
}
Apr 26, 2011 8:23:40 PM com.mongodb.DBTCPConnector$MyPort error
SEVERE: MyPort.error called
java.lang.IllegalArgumentException: response too long: 1278031173
at com.mongodb.Response.<init>(Response.java:40)
at com.mongodb.DBPort.go(DBPort.java:101)
at com.mongodb.DBPort.go(DBPort.java:66)
at com.mongodb.DBPort.call(DBPort.java:56)
at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:211)
at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:266)
at com.mongodb.DBCursor._check(DBCursor.java:309)
at com.mongodb.DBCursor._hasNext(DBCursor.java:431)
at com.mongodb.DBCursor.hasNext(DBCursor.java:456)
at com.mongodb.casbah.MongoCursorBase$class.hasNext(MongoCursor.scala:72)
at com.mongodb.casbah.MongoCursor.hasNext(MongoCursor.scala:517)
at scala.collection.Iterator$class.foreach(Iterator.scala:631)
at com.mongodb.casbah.MongoCursor.foreach(MongoCursor.scala:517)
at Sequencer$$anonfun$3.apply(Sequencer.scala:23)
at Sequencer$$anonfun$3.apply(Sequencer.scala:20)
at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:61)
at scala.collection.immutable.List.foreach(List.scala:45)
at Sequencer$.<init>(Sequencer.scala:20)
at Sequencer$.<clinit>(Sequencer.scala)
at Sequencer.main(Sequencer.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)
Exception in thread "main" java.lang.ExceptionInInitializerError
at Sequencer.main(Sequencer.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)
Caused by: java.lang.IllegalArgumentException: response too long: 1278031173
at com.mongodb.Response.<init>(Response.java:40)
at com.mongodb.DBPort.go(DBPort.java:101)
at com.mongodb.DBPort.go(DBPort.java:66)
at com.mongodb.DBPort.call(DBPort.java:56)
at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:211)
at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:266)
at com.mongodb.DBCursor._check(DBCursor.java:309)
at com.mongodb.DBCursor._hasNext(DBCursor.java:431)
at com.mongodb.DBCursor.hasNext(DBCursor.java:456)
at com.mongodb.casbah.MongoCursorBase$class.hasNext(MongoCursor.scala:72)
at com.mongodb.casbah.MongoCursor.hasNext(MongoCursor.scala:517)
at scala.collection.Iterator$class.foreach(Iterator.scala:631)
at com.mongodb.casbah.MongoCursor.foreach(MongoCursor.scala:517)
at Sequencer$$anonfun$3.apply(Sequencer.scala:23)
at Sequencer$$anonfun$3.apply(Sequencer.scala:20)
at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:61)
at scala.collection.immutable.List.foreach(List.scala:45)
at Sequencer$.<init>(Sequencer.scala:20)
at Sequencer$.<clinit>(Sequencer.scala)
... 6 more
例外は、Javaドライバの「Response.java」で次のチェックによって生成されたようです。
ByteArrayInputStream bin = new ByteArrayInputStream( b );
_len = Bits.readInt( bin );
if ( _len > ( 32 * 1024 * 1024 ) )
throw new IllegalArgumentException( "response too long: " + _len );
返された特定のオブジェクトが原因である可能性がありますか?またはこれはcasbahについてでしょうか?
ありがとう、デレク