引起Spring Boot故障安全清除（收集）的原因
我有一个Java Spring Boot" title="Spring Boot">Spring Boot应用程序，具有以下与以下异常相关的实体
@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;
@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;
我的fbt存储库中有以下查询
FBT findByMainProductAndCollection(SProduct mainProduct,Date collection);当mainProduct和collection的数据库中存在数据时，导致以下消息输出异常，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) :
我决定放弃上述内容，而是编写一个@query进行计数，因为我只需要确定数据是否存在，就可以避免出现此问题，这使我认为我应该更改所有代码以使用@query。
@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);
尽管类似地，当产品已经存在于一个SProduct的数据库中时，这似乎也是随机发生的。
SProductRepo.saveAndFlush(s);我说随机是因为11个运行相同代码的应用程序随上述消息随机间隔退出。该代码不会生成任何异常，并且成功导致数据库更新的10000相同的代码也会导致失败。当尝试更新以前使用过的数据库时，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.engine.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
另外，SProduct findByAsin（String asin）查询会导致相同的问题，但是数据库中的查询可以正常工作，并且该操作过去可以在Spring
Boot中工作。
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？
为什么尽管插入语句周围的try catch语句是我代码中最后执行的语句，但是为什么他们仍停止我的应用程序？
是否有日志调试设置可用于确定生成消息的确切原因？
有没有办法关闭或控制此功能？
<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增加到了2gb，但是内存仅是可用内存的30％。
关于这个问题有什么想法吗？
问候亚历克斯
回答：
你可以试试@Fetch(value = SELECT)吗？
@OneToMany(fetch = FetchType.EAGER, mappedBy = "mainProduct", cascade = CascadeType.ALL)@Fetch(value=FetchMode.SELECT)
private Set<FBT> fbts;
以上是 引起Spring Boot故障安全清除（收集）的原因 的全部内容， 来源链接： utcz.com/qa/402406.html
