The mr-course-assignments from pasalab

[ERROR] Java 8 migration: replace anonymous type with lambda in alluxio.web.WebInterfaceWorkerMetricsServlet#populateValues #326

助教您好，我的作业是326，其中有一段，需要将
Map<String, Counter> counters = mr.getCounters(new MetricFilter() {
@OverRide
public boolean matches(String name, Metric metric) {
return !(name.endsWith("Ops"));
}
});
替换为
Map<String, Counter> counters = mr.getCounters((name, metric) -> !(name.endsWith("Ops")));
但是总是编译失败，报错。
我是直接将代码复制粘贴的，还是一直报错。
用源码编译的时候就success，助教，这部分代码替换成这样真的没问题吗？因为我真的不知道怎么改了啊。。。麻烦解答了。。。谢谢。。。

(Your NJUID here)

MF1833098

(Your Task link here)

Alluxio/Community#312

(Your PR link here)

Alluxio/alluxio#7989

MF1833055 ‘s PR link is wrong.

MF1833089

Alluxio/Community#309

Alluxio/alluxio#8015

MF1833022

Error in validating the code style

Error after executing the following command:
mvn clean install -DskipTests

Error details：
[ERROR] GC overhead limit exceeded -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/OutOfMemoryError

I have added
export MAVEN_OPTS="-Xms4096m -Xmx4096m -XX:PermSize=1024m -XX:MaxPermSize=1024m"
to the file .bash_profile, but it doesn't work.

How can I solve this problem？
Thank you!

I have completed my assignment about the issue#258 with the corresponding pull request, and my NJUID is DZ1833038. Thanks.

Test FAILed.

Alluxio/alluxio#7953

安照教程修改了指定的部分但一直通不过 #289

Merged build finished. Test FAILed.

Alluxio/alluxio#7972
MF1833082
任务是：
Replace

  StringBuffer sSum = new StringBuffer();

with

  StringBuilder sSum = new StringBuilder();

本地是build success的，不知道为什么提交后就Test Failed的了。

(My NJUID here)

MF1833065

(My Task link here)

Alluxio/Community#298

(My PR link here)

Alluxio/alluxio#7991

https://github.com/Alluxio/alluxio/pull/7977

(Your NJUID here)

MF1833037

(Your Task link here)

Alluxio/Community#286

(Your PR link here)

Alluxio/alluxio#7977

MF1833041

MF1833070

Alluxio/new-contributor-tasks/issues/298
MF1833065

https://github.com/Alluxio/alluxio/pull/8023

(Your NJUID here)

MF1833084

(Your Task link here)

Alluxio/Community#373

(Your PR link here)

Alluxio/alluxio#8023

Need i create a new branch to commit my changed project?

Could i use the master branch to commit my changes? Now i have created a new branch and commit the changes to my own github repository. And i shall create a pull request, but i don't konw whether it is right.

PR的Test Failed后，多久会重新测试呢？

push新改动到对应分支后，需要额外的操作吗？

MF1833080

MF1833099

MF1833007

(Your NJUID here)

MG1833012

(Your Task link here)

Alluxio/Community#323

(Your PR link here)

Alluxio/alluxio#7983

MG1833008

MG3318015

Merged build finished. Test FAILed.

MG1833001

Alluxio/Community#332

任务是：
Replace

      Ordering.natural().onResultOf(new Function<UIFileInfo, Comparable<String>>() {
        @Override
        public Comparable<String> apply(UIFileInfo input) {
          return input.mAbsolutePath;
        }
      });

with

      Ordering.natural().onResultOf((Function<UIFileInfo, Comparable<String>>) input -> input.mAbsolutePath);

问题是：
Merged build finished. Test FAILed.
看之前的 issue 有提到每行代码的最大长度的问题，也尝试了多换几行，但是还是出现同样的问题。

PR 地址：
Alluxio/alluxio#8002

build success ,Test failed

助教：
您好！
MF1833098
Alluxio/alluxio#7981
任务是：
Replace

  if (part1 == part2) {
    return 0;
  }
  if (part1 < part2) {
    return -1;
  }
  return 1;

with

  return Long.compare(part1, part2);

在本地测试的时候是build success，提交之后的结果为test failed

MF1833109

MF1833021

{{ https://github.com/Alluxio/alluxio/pull/7978#pullrequestreview-165282897 }}

(Your NJUID here)

MF1833038

(Your Task link here)

Alluxio/Community#287

(Your PR link here)

Alluxio/alluxio#7978 (review)

MF1833006

https://github.com/Alluxio/alluxio/pull/7943

MF1833029

MF1833097

{https://github.com/Alluxio/alluxio/pull/8001}

MF1833005

Alluxio/Community#274

Alluxio/alluxio#8001

MF1833066

DZ1833024

MF1833102

https://github.com/Alluxio/alluxio/pull/7974

MF1833003

MF1833055

NJUID: MF1833066

(Your NJUID here)

DZ1833002

(Your Task link here)

Alluxio/Community#203

(Your PR link here)

Alluxio/alluxio#7930

助教你好，我的任务是:
Replace

  MetricsSystem.registerGaugeIfAbsent(MetricsSystem.getMetricName(CAPACITY_TOTAL),
      new Gauge<Long>() {
        @Override
        public Long getValue() {
          return blockWorker.getStoreMeta().getCapacityBytes();
        }
      });

  MetricsSystem.registerGaugeIfAbsent(MetricsSystem.getMetricName(CAPACITY_USED),
      new Gauge<Long>() {
        @Override
        public Long getValue() {
          return blockWorker.getStoreMeta().getUsedBytes();
        }
      });

  MetricsSystem.registerGaugeIfAbsent(MetricsSystem.getMetricName(CAPACITY_FREE),
      new Gauge<Long>() {
        @Override
        public Long getValue() {
          return blockWorker.getStoreMeta().getCapacityBytes() - blockWorker.getStoreMeta()
              .getUsedBytes();
        }
      });

with

  MetricsSystem.registerGaugeIfAbsent(MetricsSystem.getMetricName(CAPACITY_TOTAL),
          () -> blockWorker.getStoreMeta().getCapacityBytes());

  MetricsSystem.registerGaugeIfAbsent(MetricsSystem.getMetricName(CAPACITY_USED),
          () -> blockWorker.getStoreMeta().getUsedBytes());

  MetricsSystem.registerGaugeIfAbsent(MetricsSystem.getMetricName(CAPACITY_FREE),
          () -> blockWorker.getStoreMeta().getCapacityBytes() - blockWorker.getStoreMeta()
              .getUsedBytes());

提交之后，Merged build finished. Test PASSed.但是最后给的回复是：Thanks for contributing! It looks like this change has already been made by another pull request。请问一下这是什么情况呀？

MG1833029

DZ1833020