java.lang.OutOfMemoryError: Java堆空间
提问于 2014-09-04 11:17:05
我使用的是cassandra 2.0.8，并得到了这个异常
INFO 16:44:50,132 Initializing system.batchlog
INFO 16:44:50,138 Initializing system.sstable_activity
INFO 16:44:50,142 Opening /var/lib/cassandra/data/system/sstable_activity/system-sstable_activity-jb-10 (826 bytes)
INFO 16:44:50,142 Opening /var/lib/cassandra/data/system/sstable_activity/system-sstable_activity-jb-9 (827 bytes)
INFO 16:44:50,142 Opening /var/lib/cassandra/data/system/sstable_activity/system-sstable_activity-jb-11 (825 bytes)
INFO 16:44:50,150 reading saved cache /var/lib/cassandra/saved_caches/system-sstable_activity-KeyCache-b.db
java.lang.OutOfMemoryError: Java heap space
Dumping heap to java_pid3460.hprof ...
Heap dump file created [13378724 bytes in 0.071 secs]
ERROR 16:44:50,333 Exception encountered during startup
java.lang.OutOfMemoryError: Java heap space
at java.util.ArrayList.<init>(ArrayList.java:144)
at org.apache.cassandra.db.RowIndexEntry$Serializer.deserialize(RowIndexEntry.java:120)
at org.apache.cassandra.service.CacheService$KeyCacheSerializer.deserialize(CacheService.java:365)
at org.apache.cassandra.cache.AutoSavingCache.loadSaved(AutoSavingCache.java:119)
at org.apache.cassandra.db.ColumnFamilyStore.<init>(ColumnFamilyStore.java:262)
at org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:421)
at org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:392)
at org.apache.cassandra.db.Keyspace.initCf(Keyspace.java:309)
at org.apache.cassandra.db.Keyspace.<init>(Keyspace.java:266)
at org.apache.cassandra.db.Keyspace.open(Keyspace.java:110)
at org.apache.cassandra.db.Keyspace.open(Keyspace.java:88)
at org.apache.cassandra.db.SystemKeyspace.checkHealth(SystemKeyspace.java:536)
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:261)
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:496)
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:585)
java.lang.OutOfMemoryError: Java heap space
at java.util.ArrayList.<init>(ArrayList.java:144)
at org.apache.cassandra.db.RowIndexEntry$Serializer.deserialize(RowIndexEntry.java:120)
at org.apache.cassandra.service.CacheService$KeyCacheSerializer.deserialize(CacheService.java:365)
at org.apache.cassandra.cache.AutoSavingCache.loadSaved(AutoSavingCache.java:119)
at org.apache.cassandra.db.ColumnFamilyStore.<init>(ColumnFamilyStore.java:262)
at org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:421)
at org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:392)
at org.apache.cassandra.db.Keyspace.initCf(Keyspace.java:309)
at org.apache.cassandra.db.Keyspace.<init>(Keyspace.java:266)
at org.apache.cassandra.db.Keyspace.open(Keyspace.java:110)
at org.apache.cassandra.db.Keyspace.open(Keyspace.java:88)
at org.apache.cassandra.db.SystemKeyspace.checkHealth(SystemKeyspace.java:536)
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:261)
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:496)
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:585)
Exception encountered during startup: Java heap space谁能告诉我原因和解决方案：
回答 3
Stack Overflow用户
发布于 2014-09-04 11:25:28
找到cassandra/conf/cassandra-env.sh位置
查看当前可以分配给堆的最大1/2 RAM的堆大小
#MAX_HEAP_SIZE="4G"
#HEAP_NEWSIZE="800M"如果要更改当前的堆大小，请删除注释..
MAX_HEAP_SIZE="4G"
HEAP_NEWSIZE="800M"Stack Overflow用户
发布于 2014-09-05 16:48:08
有可能你的密钥缓存占用了太多的空间(因为那是它死的地方)，但这似乎不太可能。您可以尝试在启动之前删除KeyCache
/var/lib/cassandra/saved_caches和set
key_cache_size_in_mb: 0在您的cassandra.yaml中作为测试(我不建议永久这样做)禁用它。
实际上，您可以通过打开工具包或某个堆分析器中创建的java_pid3460.hprof文件来确定是什么在填满您的堆，以确定是什么在占用空间。可能有一些有趣的事情在发生，非常奇怪的是死于13mb左右(堆的大小)。
Stack Overflow用户
发布于 2015-11-23 19:54:16
删除usr/local/var/lib/cassandra/commitlog/中的所有日志文件并重新启动Cassandra。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/25664128
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