我搜索了很多方法來解決這個問題很久了,但是這個方法也解決不了我的問題,所以需要你的幫助來解決這個問題,非常感謝你!更新mongo拋出ConcurrentModificationException?
異常堆棧:
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:977)
at java.util.HashMap$KeyIterator.next(HashMap.java:1012)
at org.bson.BSONEncoder.putIterable(BSONEncoder.java:258)
at org.bson.BSONEncoder._putObjectField(BSONEncoder.java:198)
at org.bson.BSONEncoder.putObject(BSONEncoder.java:140)
at org.bson.BSONEncoder._putObjectField(BSONEncoder.java:190)
at org.bson.BSONEncoder.putIterable(BSONEncoder.java:259)
at org.bson.BSONEncoder._putObjectField(BSONEncoder.java:198)
at org.bson.BSONEncoder.putObject(BSONEncoder.java:140)
at org.bson.BSONEncoder._putObjectField(BSONEncoder.java:190)
at org.bson.BSONEncoder.putObject(BSONEncoder.java:140)
at org.bson.BSONEncoder.putObject(BSONEncoder.java:86)
at com.mongodb.OutMessage.putObject(OutMessage.java:190)
at com.mongodb.DBApiLayer$MyCollection.update(DBApiLayer.java:341)
at com.mongodb.DBCollection.update(DBCollection.java:150)
at com.autonavi.sns.util.TileCache.updateToMongo(TileCache.java:589)
at com.autonavi.sns.util.TileCache.updatePoint(TileCache.java:349)
at com.autonavi.sns.workflow.function.UpdatePointFunc.updatePoint(UpdatePointFunc.java:82)
at com.autonavi.sns.workflow.function.UpdatePointFunc.doExec(UpdatePointFunc.java:37)
at com.autonavi.sns.workflow.function.SNSFunction.execFunc(SNSFunction.java:42)
at com.autonavi.sns.workflow.function.SNSFunction.execFunc(SNSFunction.java:45)
at com.autonavi.sns.workflow.function.SNSFunction.execFunc(SNSFunction.java:45)
at com.autonavi.sns.workflow.function.SNSFunction.execFunc(SNSFunction.java:45)
at com.autonavi.sns.workflow.function.SNSFunction.execFunc(SNSFunction.java:45)
at com.autonavi.sns.workflow.SNSWorkFlow.startExec(SNSWorkFlow.java:45)
at com.autonavi.sns.workflow.SNSWorkFlow.execute(SNSWorkFlow.java:31)
at com.autonavi.sns.service.SNSThreadHandler.serviceDispacth(SNSThreadHandler.java:79)
at com.autonavi.sns.service.SNSThreadHandler.run(SNSThreadHandler.java:47)
at java.lang.Thread.run(Thread.java:662)
集更新的關鍵:
BasicDBObject udbo = new BasicDBObject();
udbo.put(ConstantUtil.MONGO_ID_KEY, tileId);
List<BasicDBObject> plist = new ArrayList<BasicDBObject>();
for (PointBasic p : points) {
BasicDBObject pkey = new BasicDBObject();
boolean isPhysic = p.isPhysicPoint();
pkey.put("isphysic", isPhysic);
pkey.put("x", p.getX());
pkey.put("y", p.getY());
pkey.put("picurl", p.getPicUrl());
pkey.put("area", p.getArea());
plist.add(pkey);
}
BasicDBObject pdbo = new BasicDBObject();
pdbo.put("$set", new BasicDBObject("point", plist));
return this.updateToMongo(udbo, pdbo, TILE_LAYER);
更新鍵MONGO:
private boolean updateToMongo(BasicDBObject udbo, BasicDBObject ukey, long layer) {
boolean flag = false;
try {
this.mongo = MongoDatabaseUtil.getInstance();
this.coll = mongo.getCollection(ConstantUtil.TILE_COLL + layer);
this.coll.update(udbo, ukey, true, true);
flag = true;
} catch (MongoException e) {
LOG.error("Mongo error : ", e);
}
return flag;
}
是的,我的應用程序是多線程的,但是每個線程在新類中調用updateToMongo,那麼BasicDBObject會影響updateToMongo方法嗎?謝謝 ! – dawnsky 2012-02-22 06:39:19
是的,你是對的,MongoDatabaseUtil是一個Singleton,當我調用方法updateToMongo – dawnsky 2012-02-22 08:37:57