org.neo4j.kernel.guard.GuardTimeoutException：超时发生（超时= 2）

Question

neo4j-server.properties

org.neo4j.server.webserver.maxthreads=1000

neo4j.properties

execution_guard_enabled=true

我的代码：

for (int i = 0; i < 100000; i++) {
    try (Transaction tx = service.beginTx();) {
       // do somthing
        tx.success();
        tx.close();
    }catch(Exception ex){
        throw ex;
      }

}

运行大约3个小时，发生GuardTimeoutException如下：

org.neo4j.kernel.guard.GuardTimeoutException: timeout occured (overtime=2)
at org.neo4j.kernel.guard.Guard$Timeout.check(Guard.java:128)
at org.neo4j.kernel.guard.Guard.check(Guard.java:42)
at org.neo4j.kernel.impl.api.GuardingStatementOperations.nodeGetRelationships(GuardingStatementOperations.java:357)
at org.neo4j.kernel.impl.api.OperationsFacade.nodeGetRelationships(OperationsFacade.java:352)
at org.neo4j.kernel.impl.core.NodeProxy$2.iterator(NodeProxy.java:194)
at org.neo4j.kernel.impl.core.NodeProxy$2.iterator(NodeProxy.java:186)
at com.xxx.neo4j.plugin.knitter.service.KnitterService.setInvestFrom(KnitterService.java:389)