并发时 Communication 统计有异常

在项目实践中同时触发两个job任务 datax 打印出日志任务
2021-07-14 19:56:22.531 INFO 14772 --- [job-26] com.alibaba.datax.core.job.JobContainer :
任务启动时刻 : 2021-07-14 19:56:12
任务结束时刻 : 2021-07-14 19:56:22
任务总计耗时 : 10s
任务平均流量 : 2.49KB/s
记录写入速度 : 17rec/s
读出记录总数 : 170
读写失败总数 : 0

: Total 170 records, 25495 bytes | Speed 2.49KB/s, 17 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00%
2021-07-14 19:56:22.763 INFO 14772 --- [job-852] com.alibaba.datax.core.job.JobContainer :
任务启动时刻 : 2021-07-14 19:56:12
任务结束时刻 : 2021-07-14 19:56:22
任务总计耗时 : 10s
任务平均流量 : 2.49KB/s
记录写入速度 : 17rec/s
读出记录总数 : 170
读写失败总数 : 0
其中第一个任务真实交换量是170条数据 第二个任务的交换量不是170条数据。

Start at com.alibaba.datax.core.job.JobContainer and inspect how Communication statistics are collected or reported when two jobs run concurrently. Reproduce the reported two-job scenario and compare each job's record totals; done means each job's log reports its own exchange count rather than sharing another job's value.

Written by the indexing model from the issue text.