可能同一个connection多线程导致问题

[billForgithub]

我在使用指定表分片后 ，使用非分片字段查询多次经常会线程这个问题

java.lang.ArrayIndexOutOfBoundsException: 1
at java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:368) ~[na:1.7.0_71]
at java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:377) ~[na:1.7.0_71]
at com.alibaba.druid.filter.FilterChainImpl.nextFilter(FilterChainImpl.java:405) ~[druid-1.0.9.jar:1.0.9]
at com.alibaba.druid.filter.FilterChainImpl.connection_getAutoCommit(FilterChainImpl.java:282) ~[druid-1.0.9.jar:1.0.9]
at com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl.getAutoCommit(ConnectionProxyImpl.java:212) ~[druid-1.0.9.jar:1.0.9]
at com.alibaba.druid.pool.DruidPooledConnection.transactionRecord(DruidPooledConnection.java:689) ~[druid-1.0.9.jar:1.0.9]
at com.alibaba.druid.pool.DruidPooledStatement.transactionRecord(DruidPooledStatement.java:131) ~[druid-1.0.9.jar:1.0.9]
at com.alibaba.druid.pool.DruidPooledPreparedStatement.executeQuery(DruidPooledPreparedStatement.java:221) ~[druid-1.0.9.jar:1.0.9]
at com.dangdang.ddframe.rdb.sharding.executor.PreparedStatementExecutor.executeQueryInternal(PreparedStatementExecutor.java:86) ~[sharding-jdbc-core-1.3.2.jar:na]
at com.dangdang.ddframe.rdb.sharding.executor.PreparedStatementExecutor.access$000(PreparedStatementExecutor.java:46) ~[sharding-jdbc-core-1.3.2.jar:na]
at com.dangdang.ddframe.rdb.sharding.executor.PreparedStatementExecutor$1.execute(PreparedStatementExecutor.java:71) ~[sharding-jdbc-core-1.3.2.jar:na]
at com.dangdang.ddframe.rdb.sharding.executor.PreparedStatementExecutor$1.execute(PreparedStatementExecutor.java:67) ~[sharding-jdbc-core-1.3.2.jar:na]
at com.dangdang.ddframe.rdb.sharding.executor.ExecutorEngine$1.call(ExecutorEngine.java:109) ~[sharding-jdbc-core-1.3.2.jar:na]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) ~[na:1.7.0_71]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_71]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_71]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_71]

查询druid后发现是 druid中 FilterChainImpl类方法

@Override
public boolean connection_getAutoCommit(ConnectionProxy connection) throws SQLException {
    if (this.pos < filterSize) {
        return nextFilter().connection_getAutoCommit(this, connection);
    }

    return connection.getRawObject().getAutoCommit();
}

引起的 一个 越界错误，感觉可能是因为多线程使用同一个连接导致的多线程访问导致的问题

[hanahmily]

对于PreparedStatement的缓存导致的问题