今天下午使用 datagrip 远程连接 hive 突然中断，无法连接，拒绝连接
看了一下 hiveserver2 日志
2022-08-08 15:41:37,407 Log4j2-TF-2-AsyncLogger[AsyncContext@2c8d66b2]-1 ERROR Unable to invoke factory method in class org.apache.hadoop.hive.ql.log.HushableRandomAccessFileAppender for element HushableMutableRandomAccess: java.lang.OutOfMemoryError: Java heap space java.lang.reflect.InvocationTargetException
...
2022-08-08 15:41:37,783 Log4j2-TF-2-AsyncLogger[AsyncContext@2c8d66b2]-1 ERROR Unable to create Appender of type HushableMutableRandomAccess
2022-08-08 15:41:40,031 Log4j2-TF-2-AsyncLogger[AsyncContext@2c8d66b2]-1 ERROR Unable to invoke factory method in class org.apache.hadoop.hive.ql.log.HushableRandomAccessFileAppender for element HushableMutableRandomAccess: java.lang.OutOfMemoryError: GC overhead limit exceeded java.lang.reflect.InvocationTargetException
...
2022-08-08 15:41:40,726 Log4j2-TF-2-AsyncLogger[AsyncContext@2c8d66b2]-1 ERROR Unable to create Appender of type HushableMutableRandomAccess
AsyncLogger error handling event seq=19835, value='[ERROR calling class org.apache.logging.log4j.core.async.RingBufferLogEvent.toString(): java.lang.NullPointerException]':
java.lang.OutOfMemoryError: GC overhead limit exceeded
2022-08-08 15:41:42,918 Log4j2-TF-2-AsyncLogger[AsyncContext@2c8d66b2]-1 ERROR Unable to invoke factory method in class org.apache.hadoop.hive.ql.log.HushableRandomAccessFileAppender for element HushableMutableRandomAccess: java.lang.OutOfMemoryError: Java heap space java.lang.reflect.InvocationTargetException
...
Caused by: java.lang.OutOfMemoryError: Java heap space
...
2022-08-08 15:41:43,285 Log4j2-TF-2-AsyncLogger[AsyncContext@2c8d66b2]-1 ERROR Unable to create Appender of type HushableMutableRandomAccess
AsyncLogger error handling event seq=19841, value='[ERROR calling class org.apache.logging.log4j.core.async.RingBufferLogEvent.toString(): java.lang.NullPointerException]':
java.lang.OutOfMemoryError: GC overhead limit exceeded
Exception in thread "HiveServer2-Handler-Pool: Thread-252" java.lang.OutOfMemoryError: GC overhead limit exceeded
...
这是很明显的 OutOfMemoryError问题
首先，排查集群虚机内存
发现，并没有什么问题，没有超标
有大佬说是内存配置的鬼
看了一眼，确实没配
说干就干，开始操作
1. 修改堆内存大小
cd /datafs/module/hive/conf/
cp hive-env.sh.template hive-env.sh
vim hive-env.sh
添加内容
export HADOOP_HEAPSIZE=1024
2. 重启 hiveserver2
hiveserver2 后台启动脚本
3. 再使用 datagrip 阔以连接hive，而且执行 sql 成功，无报错
所以使用 hiveserver2 如果再遇到 报错 OutOfMemoryError
我们的解决思路可以如下：
a. 修改 hive 目录下的 conf/hive-env.sh文件
export HADOOP_HEAPSIZE=1024
调大 HADOOP_HEAPSIZE堆内存的大小
b. 增加虚机内存
c. 使用物理机，加大内存
d. 优化 sql
待更新…
我们下期见，拜拜！