我有一个Java Sping Boot 应用程序,其中包含与以下异常相关的以下实体
S产品
@Entity
@Table(
name = "product",
indexes = @Index(
name = "idx_asin",
columnList = "asin",
unique = true
)
)
public class SProduct implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(name = "asin", unique = false, nullable = false, length = 10)
private String asin;
@Column(name = "rootcategory")
private Long rootcategory;
@Column(name = "imageCSV", unique = false, nullable = true, length = 350)
private String imagesCSV;
@Column(name = "title", unique = false, nullable = true, length = 350)
private String title;
private Date created;
@OneToMany(fetch = FetchType.EAGER, mappedBy = "mainProduct", cascade = CascadeType.ALL)
private Set<FBT> fbts;
@OneToOne(fetch = FetchType.EAGER, mappedBy = "downloadProductId", cascade = CascadeType.ALL)
private Download download;
*FBT
@Entity
@Table(
name = "fbt",
uniqueConstraints={@UniqueConstraint(columnNames = {"main_product_id" , "collection"})},
indexes = {@Index(
name = "idx_main_product_id",
columnList = "main_product_id",
unique = false),
@Index(
name = "idx_product_fbt1id",
columnList = "product_fbt1_id",
unique = false),
@Index(
name = "idx_product_fbt2id",
columnList = "product_fbt2_id",
unique = false)
}
)
public class FBT implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@ManyToOne
@JoinColumn(name = "main_product_id")
private SProduct mainProduct;
@ManyToOne
@JoinColumn(name = "product_fbt1_id")
private SProduct sproductFbt1;
@ManyToOne
@JoinColumn(name = "product_fbt2_id")
private SProduct sproductFbt2;
@Column(name = "bsr", nullable = false)
private int bsr;
private Date collection;
我在我的fbt存储库中有以下查询
FBT findByMainProductAndCollection(SProduct mainProduct,Date collection);
这导致以下消息在数据库中存在mainProduct和集合的数据时输出异常,否则返回null。
<message>HHH000100: Fail-safe cleanup (collections) : org.hibernate.engine.loading.internal.CollectionLoadContext@69b7fcfc<rs=HikariProxyResultSet@325408381 wrapping com.mysql.jdbc.JDBC42ResultSet@108693fa></message>
<message>HHH000160: On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [1] entries</message>
<message>HHH000100: Fail-safe cleanup (collections) : org.hibernate.engine.loading.internal.CollectionLoadContext@47c40535<rs=HikariProxyResultSet@2005129089 wrapping com.mysql.jdbc.JDBC42ResultSet@9894f70></message>
<message>HHH000160: On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [1] entries</message>
<message>HHH000100: Fail-safe cleanup (collections) : org.hibernate.engine.loading.internal.CollectionLoadContext@5b0cd175<rs=HikariProxyResultSet@1598144514 wrapping com.mysql.jdbc.JDBC42ResultSet@6a7ff475></message>
<message>HHH000160: On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [1] entries</message>
<message>HHH000100: Fail-safe cleanup (collections) : org.hibernate.engine.loading.internal.CollectionLoadContext@f67e2cc<rs=HikariProxyResultSet@319200129 wrapping com.mysql.jdbc.JDBC42ResultSet@215b8a6></message>
<message>HHH000160: On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [1] entries</message>
<message>HHH000100: Fail-safe cleanup (collections) : org.hibernate.engine.loading.internal.CollectionLoadContext@5961afc0<rs=HikariProxyResultSet@1772496904 wrapping com.mysql.jdbc.JDBC42ResultSet@5956a59b></message>
<message>HHH000160: On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [1] entries</message>
<message>HHH000100: Fail-safe cleanup (collections) :
我决定放弃上面的方法,写一个@query来计数,因为我只需要确定数据是否存在,这就防止了让我认为我应该把所有代码都改成@query的问题。
@Query("select count(*) as count from FBT where main_product_id = :id and collection= :collection")
int countByMainProductIdAndCollection(@Param("id") long id, @Param("collection") Date collection);
尽管这类似地也在一个S产品的数据库更新时随机发生,而该产品已经存在于数据库中。
SProductRepo.saveAndFlush(s);
我说随机,因为11个运行相同代码的应用程序以随机间隔退出上述消息。代码不会产生异常,并且使用导致失败的相同代码会成功更新10000个数据库。当尝试更新以前工作的数据库时,代码停止。
""2018-12-28 00:56:06 [KeepaAPI-RetryScheduler] WARN org.hibernate.engine.loading.internal.LoadContexts - HHH000100: Fail-safe cleanup (collections) : org.hibernate.eng
ine.loading.internal.CollectionLoadContext@5c414639<rs=HikariProxyResultSet@1241510017 wrapping Result set representing update count of 13>
""2018-12-28 00:56:06 [KeepaAPI-RetryScheduler] WARN org.hibernate.engine.loading.internal.CollectionLoadContext - HHH000160: On CollectionLoadContext#cleanup, localLoa
dingCollectionKeys contained [1] entries
""2018-12-28 00:56:06 [KeepaAPI-RetryScheduler] WARN org.hibernate.engine.loading.internal.LoadContexts - HHH000100: Fail-safe cleanup (collections) : org.hibernate.eng
ine.loading.internal.CollectionLoadContext@5595c065<rs=HikariProxyResultSet@2140082434 wrapping Result set representing update count of 14>
""2018-12-28 00:56:06 [KeepaAPI-RetryScheduler] WARN org.hibernate.engine.loading.internal.CollectionLoadContext - HHH000160: On CollectionLoadContext#cleanup, localLoa
dingCollectionKeys contained [1] entries
""2018-12-28 00:56:06 [KeepaAPI-RetryScheduler] WARN org.hibernate.engine.loading.internal.LoadContexts - HHH000100: Fail-safe cleanup (collections) : org.hibernate.eng
ine.loading.internal.CollectionLoadContext@2956fe24<rs=HikariProxyResultSe
此外,SProductfindByAsin(Stringasin)查询也会导致同样的问题,但是数据库中的查询工作得很好,这在Spring Boot 中也能正常工作。
mysql> select * from product where asin="B004FXJOQO";
| id | asin | created | imagecsv | rootcategory | title | 9 | B004FXJOQO | 2018-08-04 | 41T0ZwTvSSL.jpg,61V90AZKbGL.jpg,51AdEGCTZqL.jpg,51LDnCYfR0L.jpg,71bbIw43PjL.jpg | 228013 | Dual Voltage Tester, Non Contact Tester for High and Low Voltage with 3-m Drop Protection Klein Tools NCVT-2 |
1 row in set (0.00 sec)
我想知道的是,产生这种消息的一般原因是什么?
为什么他们停止我的应用程序,尽管我的插入语句周围的try catch语句是我代码中最后执行的语句?
是否有日志调试设置可用于确定生成消息的确切原因?
是否有方法关闭或控制此功能?
Pom
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
<maven.test.skip>true</maven.test.skip>
</properties>
<repositories>
<repository>
<id>Keepa</id>
<name>Keepa Repository</name>
<url>https://keepa.com/maven/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.7</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.18</version>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.22.0</version>
</dependency>
<dependency>
<groupId>com.google.oauth-client</groupId>
<artifactId>google-oauth-client-jetty</artifactId>
<version>1.22.0</version>
</dependency>
<dependency>
<groupId>com.google.apis</groupId>
<artifactId>google-api-services-oauth2</artifactId>
<version>v1-rev120-1.22.0</version>
</dependency>
<dependency>
<groupId>com.google.oauth-client</groupId>
<artifactId>google-oauth-client-java6</artifactId>
<version>1.22.0</version>
</dependency>
<dependency>
<groupId>com.google.oauth-client</groupId>
<artifactId>google-oauth-client</artifactId>
<version>1.22.0</version>
</dependency>
<dependency>
<groupId>com.google.apis</groupId>
<artifactId>google-api-services-gmail</artifactId>
<version>v1-rev48-1.22.0</version>
</dependency>
<dependency>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.5.0</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.54</version>
</dependency>
<dependency>
<groupId>com.myjeeva.digitalocean</groupId>
<artifactId>digitalocean-api-client</artifactId>
<version>2.16</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
</dependency>
<dependency>
<groupId>com.keepa.api</groupId>
<artifactId>backend</artifactId>
<version>LATEST</version>
</dependency>
<dependency>
<groupId>org.jdeferred</groupId>
<artifactId>jdeferred-core</artifactId>
<version>1.2.6</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>22.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build
我将内存从1GB增加到2GB,但内存只有可用内存的30%。
有什么想法吗?
8条答案
按热度按时间9udxz4iz1#
在我的例子中,这是因为实体递归地调用对方的散列代码,如果你使用lombock,请删除它并自己创建它。你会发现他们在互相打电话。例如,从第一个实体的hashcode方法中删除第二个实体的链接。
rfbsl7qr2#
我在使用Set时遇到了这个问题,但当我更改为List时,它已解决,您应该使用
yshpjwxd3#
首先,这是一个由
org.hibernate.engine
处理的Hibernate错误,与Sping Boot 无关。如果您正在获取大量数据,例如使用HQL查询获取数万个实体,则可能会发生这种情况。
如果你Map了一个一对多的关联,它有许多子实体,并且由于双向Map,结果集无限复制,也可能是这种情况。
请参阅下面的链接以获取高性能JPA提示。
https://vladmihalcea.com/14-high-performance-java-persistence-tips/
f87krz0w4#
在我的例子中,我得到**“java.lang.StackOverflowError:在具有双向关系 @ManyToOne 和 @OneToMany 的特定实体上运行JPA * 保存 * 方法时,奇怪的是,它只在Oracle和PostgreSQL上失败,但在MySQL,MariaDB和SQLServer上工作正常。
所以问题是 lombok 与 HashCode 在 @OneToMany 实体中。
我解决了它设置这个注解中的实体在级别类:
xqk2d5yq5#
你可以试试
@Fetch(value = SELECT)
吗?fnvucqvd6#
看起来你在应用程序中加载了大量的数据。
述的方法
将加载所有匹配的数据。但你只需要count尝试查询,确切地返回count数据而不是所有数据。
一种方法是使用你提到的查询,另一种方法是
或
mwkjh3gx7#
在我的例子中,我使用了一个自动生成的
Repository
方法,它返回List<MyData>
。事实证明,2000个实体对Hibernate来说太多了。我修复了这个问题,将其替换为一个返回Stream<MyData>
的方法,然后将实体Map到手工构建的结构MyDataDetached
。w8f9ii698#
我也遇到了同样的问题,我通过在上面添加OneToMany和ManyToOne来解决它。
如果你想用父对象而不是子对象来生成JSON,你可以用
@JsonBackReference
来注解product,用@JsonManagedReference
来注解ftb,或者将@JsonIgnore
添加到这两个实体中。