Hibernate + EhCache = java.io.NotSerializableException - PullRequest
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Hibernate + EhCache = java.io.NotSerializableException

11 голосов
/ 03 августа 2010

Сейчас я делаю нагрузочный тест. После примерно 900 запросов я получил эту ошибку: 

[ 03.08.10 11:49:00.465] [Store org.hibernate.cache.StandardQueryCache Spool Thread] ERROR net.sf.ehcache.store.DiskStore  - org.hibernate.cache.StandardQueryCacheCache: Failed to write element to disk 'sql: select hotelfeatu0_.name as col_0_0_ from feature hotelfeatu0_ where hotelfeatu0_.class='org.company.domains.HotelFeatures' and hotelfeatu0_.lang=? and hotelfeatu0_.hotel_id=?; parameters: ; named parameters: {ht=100: 'Hotel', lng=en}'. Initial cause was org.company.domains.Hotel
java.io.NotSerializableException: org.company.domains.Hotel
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
    at java.util.HashMap.writeObject(HashMap.java:1001)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
    at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
    at net.sf.ehcache.Element.writeObject(Element.java:729)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
    at net.sf.ehcache.util.MemoryEfficientByteArrayOutputStream.serialize(MemoryEfficientByteArrayOutputStream.java:75)
    at net.sf.ehcache.store.DiskStore.serializeElement(DiskStore.java:781)
    at net.sf.ehcache.store.DiskStore.writeElement(DiskStore.java:735)
    at net.sf.ehcache.store.DiskStore.writeOrReplaceEntry(DiskStore.java:729)
    at net.sf.ehcache.store.DiskStore.flushSpool(DiskStore.java:703)
    at net.sf.ehcache.store.DiskStore.throwableSafeFlushSpoolIfRequired(DiskStore.java:671)
    at net.sf.ehcache.store.DiskStore.spoolAndExpiryThreadMain(DiskStore.java:640)
    at net.sf.ehcache.store.DiskStore.access$900(DiskStore.java:68)
    at net.sf.ehcache.store.DiskStore$SpoolAndExpiryThread.run(DiskStore.java:1110)

Вот мой ehcache.xml: 

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="false">

    <diskStore path="java.io.tmpdir/sweethome"/>

    <defaultCache
            maxElementsInMemory="10000"
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="120"
            overflowToDisk="true"
            maxElementsOnDisk="10000000"
            diskPersistent="false"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU"
    />

    <cache
                name="org.hibernate.cache.StandardQueryCache"
                maxElementsInMemory="5"
                eternal="false"
                timeToLiveSeconds="120"
                overflowToDisk="true"
    />

</ehcache>

Конфигурация Hibernate: 

hibernate {
    cache.use_second_level_cache=true
    cache.use_query_cache=true
    cache.provider_class='org.hibernate.cache.EhCacheProvider'
    connection.useUnicode=true
    connection.characterEncoding='UTF-8'
    dialect = 'org.hibernate.dialect.MySQL5InnoDBDialect'
}

1 Ответ

11 голосов
/ 03 августа 2010

В журнале говорится, что это происходит потому, что кеш запросов пытается записать один из ваших org.company.domains.Hotel объектов на диск.Не удивительно, что это может произойти во время нагрузочного теста, так как вы разрешаете только 5 элементов в кэше запросов в памяти, прежде чем он попытается сбросить его на диск.или установите overflowToDisk="false" для кэша запросов.

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