6
正如你我都知道的，關於這類錯誤信息有很多問題。關鍵'PRIMARY'的重複條目'...'
但我無法找到任何好的答案，因爲有這麼多的答案。
我有一個表格存儲nonce從客戶端發送。
但即使沒有具有完全相同主鍵的記錄，有時（偶爾）db也會抱怨重複的主鍵插入。
下面是JVM顯示的內容。
[#|2012-11-09T11:06:52.098+0900|WARNING|glassfish3.1.2|javax.enterprise.system.container.ejb.com.sun.ejb.containers|_ThreadID=236;_ThreadName=Thread-2;|EJB5184:A system exception occurred during an invocation on EJB Nonce2Bean, method: public java.lang.Object kr.co.ticomms.gameground.business.AbstractEntityFacade.persist(java.lang.Object)|#]
[#|2012-11-09T11:06:52.099+0900|WARNING|glassfish3.1.2|javax.enterprise.system.container.ejb.com.sun.ejb.containers|_ThreadID=236;_ThreadName=Thread-2;|javax.ejb.EJBException
...
Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'c8b4bdb84606fed0-c8b4bdb84606fed0_1352426820765_1880007534138556' for key 'PRIMARY'
Error Code: 1062
Call: INSERT INTO NONCE2 (NONCE, UDID, CREATED_DATE) VALUES (?, ?, ?)
bind => [3 parameters bound]
Query: InsertObjectQuery(c8b4bdb84606fed0/c8b4bdb84606fed0_1352426820765_1880007534138556402)
...
... 29 more
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'c8b4bdb84606fed0-c8b4bdb84606fed0_1352426820765_1880007534138556' for key 'PRIMARY'
Error Code: 1062
Call: INSERT INTO NONCE2 (NONCE, UDID, CREATED_DATE) VALUES (?, ?, ?)
bind => [3 parameters bound]
Query: InsertObjectQuery(c8b4bdb84606fed0/c8b4bdb84606fed0_1352426820765_1880007534138556402)
...
... 59 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'c8b4bdb84606fed0-c8b4bdb84606fed0_1352426820765_1880007534138556' for key 'PRIMARY'
|#]
下面是mysql顯示的內容。
mysql> SHOW VARIABLES LIKE "%version%";
+-------------------------+-------------------------+
| Variable_name | Value |
+-------------------------+-------------------------+
| protocol_version | 10 |
| version | 5.1.62-0ubuntu0.10.04.1 |
| version_comment | (Ubuntu) |
| version_compile_machine | x86_64 |
| version_compile_os | debian-linux-gnu |
+-------------------------+-------------------------+
5 rows in set (0.00 sec)
mysql> DESC NONCE2;
+--------------+--------------+------+-----+-------------------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------------+--------------+------+-----+-------------------+-------+
| CREATED_DATE | timestamp | NO | | CURRENT_TIMESTAMP | |
| UDID | varchar(255) | NO | PRI | NULL | |
| NONCE | varchar(255) | NO | PRI | NULL | |
+--------------+--------------+------+-----+-------------------+-------+
3 rows in set (0.00 sec)
mysql> SHOW CREATE TABLE NONCE2;
+--------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+--------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| NONCE2 | CREATE TABLE `NONCE2` (
`CREATED_DATE` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`UDID` varchar(255) NOT NULL,
`NONCE` varchar(255) NOT NULL,
PRIMARY KEY (`UDID`,`NONCE`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 |
+--------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
+--------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
| Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment |
+--------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
| NONCE2 | 0 | PRIMARY | 1 | UDID | A | 7 | NULL | NULL | | BTREE | |
| NONCE2 | 0 | PRIMARY | 2 | NONCE | A | 403 | NULL | NULL | | BTREE | |
+--------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
2 rows in set (0.00 sec)
mysql>
我嘗試刪除並重新創建表，但會出現同樣的問題。
我在GlassFish上使用JPA。
任何幫助？
----------------------------------------- UPDATE
我正在與JPA合作。
ID class。
public class NonceId implements Serializable {
public static NonceId newInstance(final String udid, final String nonce) {
if (udid == null) {
throw new IllegalArgumentException("null udid");
}
if (nonce == null) {
throw new IllegalArgumentException("null nonce");
}
final NonceId instance = new NonceId();
instance.udid = udid;
instance.nonce = nonce;
return instance;
}
@Override
public int hashCode() {
int hash = 7;
hash = 23 * hash + (this.udid != null ? this.udid.hashCode() : 0);
hash = 23 * hash + (this.nonce != null ? this.nonce.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final NonceId other = (NonceId) obj;
if ((this.udid == null) ? (other.udid != null) : !this.udid.equals(other.udid)) {
return false;
}
if ((this.nonce == null) ? (other.nonce != null) : !this.nonce.equals(other.nonce)) {
return false;
}
return true;
}
@Override
public String toString() {
return udid + "/" + nonce;
}
private String udid;
private String nonce;
}
實體類。
@Entity
@IdClass(NonceId.class)
@Table(name = "NONCE2")
@XmlTransient
public class Nonce2 implements Serializable {
public static final int UDID_SIZE_MIN = 1;
public static final int UDID_SIZE_MAX = 255;
public static final int NONCE_SIZE_MIN = 1;
public static final int NONCE_SIZE_MAX = 255;
public static Nonce2 newInstance(final String udid, final String nonce) {
if (nonce == null) {
throw new NullPointerException("null value");
}
final Nonce2 instance = new Nonce2();
instance.udid = udid;
instance.nonce = nonce;
return instance;
}
public Date getCreatedDate() {
return createdDate;
}
public String getUdid() {
return udid;
}
public String getNonce() {
return nonce;
}
@PrePersist
protected void _PrePersist() {
createdDate = new Date();
}
@Override
public String toString() {
return udid + "/" + nonce;
}
@Column(name = "CREATED_DATE", nullable = false, updatable = false)
@Temporal(TemporalType.TIMESTAMP)
@NotNull
private Date createdDate;
@Id
@Column(name = "UDID", nullable = false, updatable = false)
@NotNull
@Size(min = UDID_SIZE_MIN, max = UDID_SIZE_MAX)
private String udid;
@Id
@Column(name = "NONCE", nullable = false, updatable = false)
@NotNull
@Size(min = NONCE_SIZE_MIN, max = NONCE_SIZE_MAX)
private String nonce;
}
而在我的過濾器我做
@WebFilter(urlPatterns = {"/*"})
public class Filter_ implements Filter {
@Override
public void doFilter(final ServletRequest request,
final ServletResponse response,
final FilterChain chain)
throws IOException, ServletException {
// check whether nonce is already exist via em.find();
chain.doFilter(request, response);
// store nonce via em.persist(); // EXCEPTION IS HERE
// THERE IS NO SUCH RECORD check direct SQL console.
}
}
我JPA提供商似乎執行該語句。
INSERT INTO NONCE2 (NONCE, UDID, CREATED_DATE) VALUES (?, ?, ?)
你有沒有想過問題是什麼？在使用JPA和唯一VARCHAR（255）列的項目中，我們遇到了類似的問題。看起來異常錯誤消息只顯示索引值的前64個字符。當我們直接在DB中插入一條類似的記錄時，我們沒有重複的鍵錯誤。在你的情況下，「c8b4bdb84606fed0-c8b4bdb84606fed0_1352426820765_1880007534138556」也是64個字符長。但它並不是你想要插入的完整值：最後缺少402。 – tvirtualw
我們找到了解決我們問題的方法。默認情況下，MySQL整理不區分大小寫。我們試圖在我們的表格中插入的值具有相同的字符，有時它們僅由一個字母爲大寫字母，另一個字母爲小寫字母而不同。像'abcd'和'aBcd'一樣。使用默認排序規則會導致唯一的索引違規（我猜主鍵相同）。我們將其更改爲utf8_bin，然後它爲我們工作。 – tvirtualw
我想nonce必須有與英國俚語中的標準定義不同的含義！ – Strawberry