错误SqlExceptionHelper:java。lang.OutOfMemoryError:Java堆空间

Question

我在向服务器调用API时出错。以下是日志：

2022-04-29 12:25:36.013  WARN 25587 --- [-nio-443-exec-2] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: S1000
2022-04-29 12:25:36.015 ERROR 25587 --- [-nio-443-exec-2] o.h.engine.jdbc.spi.SqlExceptionHelper   : Java heap space
2022-04-29 12:25:36.093  WARN 25587 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=50s527ms107µs731ns).
Exception in thread "javamelody mb-rule-engine" java.lang.OutOfMemoryError: Java heap space
        at net.bull.javamelody.internal.model.Collector.collectLocalContextWithoutErrors(Collector.java:321)
        at net.bull.javamelody.FilterContext$CollectTimerTask.run(FilterContext.java:82)
        at java.base/java.util.TimerThread.mainLoop(Timer.java:556)
        at java.base/java.util.TimerThread.run(Timer.java:506)
29-Apr-2022 12:25:36.042 SEVERE [Catalina-utility-2] org.apache.catalina.core.ContainerBase.threadStart Exception processing background thread
        java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
                at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
                at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
                at org.apache.catalina.core.ContainerBase.threadStart(ContainerBase.java:1276)
                at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessorMonitor.run(ContainerBase.java:1322)
                at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
                at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
                at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
                at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
                at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
                at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
                at java.base/java.lang.Thread.run(Thread.java:829)
        Caused by: java.lang.OutOfMemoryError: Java heap space
2022-04-29 12:25:36.244  WARN 25587 --- [-nio-443-exec-6] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: S1000
2022-04-29 12:25:36.245 ERROR 25587 --- [-nio-443-exec-6] o.h.engine.jdbc.spi.SqlExceptionHelper   : Can not read response from server. Expected to read 181 bytes, read 31 bytes before connection was unexpectedly lost.
2022-04-29 12:25:36.308 ERROR 25587 --- [-nio-443-exec-2] o.s.b.w.servlet.support.ErrorPageFilter  : Forwarding to error page from request [/v2/recommendation/get-recommended-institute] due to exception [could not extract ResultSet; nested exception is org.hibernate.exception.GenericJDBCException: could not extract ResultSet]

org.springframework.orm.jpa.JpaSystemException: could not extract ResultSet; nested exception is org.hibernate.exception.GenericJDBCException: could not extract ResultSet
        at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:331) ~[spring-orm-5.3.15.jar:5.3.15]
        at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:233) ~[spring-orm-5.3.15.jar:5.3.15]
        at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:551) ~[spring-orm-5.3.15.jar:5.3.15]
        at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:61) ~[spring-tx-5.3.15.jar:5.3.15]

附截图：Java内存使用率系统CPU使用率

我还需要知道这句话的意思：

• HikariPool-1-检测到线程饥饿或时钟跳跃（管家delta=50s527ms107µs731ns）。

有人能帮我解释一下这个错误吗？

Answer 1

java的含义。lang.OutOfMemoryError:Java堆空间是指应用程序已经用完了所有可用的堆内存。

检测到线程饥饿或时钟跳跃（管家delta=50s527ms107µs731ns）的含义是某些东西正在消耗所有CPU并且（大概）高优先级管家线程注意到它正在挨饿。

饥饿信息很可能是堆填满的结果。当堆几乎满时，JVM可能会变得没有响应，因为GC一直在徒劳地试图释放一些空间。有一个JVM选项可以避免这种行为。。。当GC占用太多可用CPU时抛出OOME。