Question

当我尝试使用 persist（）方法和 kundera 框架将表保存到 cassandra 时，我收到错误：

28462 [Thread-15-localhostAMQPbolt0-executor[2 2]] INFO  d.d.pieceDAOImpl - start to insert data
28513 [Thread-15-localhostAMQPbolt0-executor[2 2]] INFO  c.i.c.c.CassandraClientBase - Returning cql query  INSERT INTO "pieces"("width","height","depth","IdPiece") VALUES(10.0,11.0,12.0,'1') .
28543 [Thread-15-localhostAMQPbolt0-executor[2 2]] ERROR c.i.c.c.CassandraClientBase - Error while executing query  INSERT INTO "pieces"("width","height","depth","IdPiece") VALUES(10.0,11.0,12.0,'1')
28544 [Thread-15-localhostAMQPbolt0-executor[2 2]] ERROR o.a.s.util - Async loop died!
java.lang.RuntimeException: com.impetus.kundera.KunderaException: com.impetus.kundera.KunderaException: InvalidRequestException(why:Unknown identifier IdPiece)
        at org.apache.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:448) ~[storm-core-1.0.0.jar:1.0.0]
        at org.apache.storm.utils.DisruptorQueue.consumeBatchWhenAvailable(DisruptorQueue.java:414) ~[storm-core-1.0.0.jar:1.0.0]
        at org.apache.storm.disruptor$consume_batch_when_available.invoke(disruptor.clj:73) ~[storm-core-1.0.0.jar:1.0.0]
        at org.apache.storm.daemon.executor$fn__8226$fn__8239$fn__8292.invoke(executor.clj:851) ~[storm-core-1.0.0.jar:1.0.0]
        at org.apache.storm.util$async_loop$fn__554.invoke(util.clj:484) [storm-core-1.0.0.jar:1.0.0]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.7.0.jar:?]
        at java.lang.Thread.run(Thread.java:745) [?:1.7.0_99]
Caused by: com.impetus.kundera.KunderaException: com.impetus.kundera.KunderaException: InvalidRequestException(why:Unknown identifier IdPiece)
        at com.impetus.kundera.persistence.EntityManagerImpl.persist(EntityManagerImpl.java:180) ~[project-0.0.1-SNAPSHOT-jar-with-dependencies.jar:?]
        at database.dao.pieceDAOImpl.insert(pieceDAOImpl.java:54) ~[project-0.0.1-SNAPSHOT-jar-with-dependencies.jar:?]
        at database.controller.DatabaseController.saveSensorEntitie(DatabaseController.java:47) ~[project-0.0.1-SNAPSHOT-jar-with-dependencies.jar:?]
        at connector.bolt.PrinterBolt.execute(PrinterBolt.java:66) ~[project-0.0.1-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.apache.storm.daemon.executor$fn__8226$tuple_action_fn__8228.invoke(executor.clj:731) ~[storm-core-1.0.0.jar:1.0.0]
        at org.apache.storm.daemon.executor$mk_task_receiver$fn__8147.invoke(executor.clj:463) ~[storm-core-1.0.0.jar:1.0.0]
        at org.apache.storm.disruptor$clojure_handler$reify__7663.onEvent(disruptor.clj:40) ~[storm-core-1.0.0.jar:1.0.0]
        at org.apache.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:435) ~[storm-core-1.0.0.jar:1.0.0]
        ... 6 more

我觉得我的id是我桌子的主键。

我的桌子：

CREATE TABLE mykeyspace.pieces (
    idpiece text PRIMARY KEY,
    depth double,
    height double,
    width double
) WITH bloom_filter_fp_chance = 0.01
    AND caching = '{"keys":"ALL", "rows_per_partition":"NONE"}'
    AND comment = ''
    AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'}
    AND compression = {'sstable_compression': 'org.apache.cassandra.io.compress.LZ4Compressor'}
    AND dclocal_read_repair_chance = 0.1
    AND default_time_to_live = 0
    AND gc_grace_seconds = 864000
    AND max_index_interval = 2048
    AND memtable_flush_period_in_ms = 0
    AND min_index_interval = 128
    AND read_repair_chance = 0.0
    AND speculative_retry = '99.0PERCENTILE';

我的班级实体

@Entity
@Table(name = "pieces", schema = "mykeyspace@cassandra_pu")
public class PieceEntitie implements Serializable{

    @Id
    private String IdPiece;
    @Column
    private double width;
    @Column
    private double height;
    @Column
    private double depth;

我该如何解决这个问题？提前谢谢你

Answer 1

Kundera在生成的查询中使用带引号的标识符。

INSERT INTO "pieces"("width","height","depth","IdPiece") VALUES(10.0,11.0,12.0,'1')

在cassandra中，引用的标识符区分大小写。所以你的表中没有这样的列“IdPiece”。

解决方案是将您的字段重命名为实体类

中的idpiece

Answer 2

在Cassandra quoted identifiers are case-sensitive。

因此，您的列名DeferredResult与表"IdPiece"中的实际列idpiece不同

InvalidRequestException（原因：未知标识符

2 个答案: