GitHub user WangTaoTheTonic opened a pull request: https://github.com/apache/flink/pull/3525
[FLINK-6020]add a random integer suffix to blob key to avoid naming conflicting In yarn-cluster mode, if we submit one same job multiple times parallelly, the task will encounter class load problem and lease occuputation. Because blob server stores user jars in name with generated sha1sum of those, first writes a temp file and move it to finalialize. For recovery it also will put them to HDFS with same file name. In same time, when multiple clients sumit same job with same jar, the local jar files in blob server and those file on hdfs will be handled in multiple threads(BlobServerConnection), and impact each other. I've found a way to solve this by adding a random integer suffix to blob key. Like changed here. You can merge this pull request into a Git repository by running: $ git pull https://github.com/WangTaoTheTonic/flink FLINK-6020 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/flink/pull/3525.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #3525 ---- commit 3d9f41afad9c831431b3c7bd0eb2a8006b92718e Author: WangTaoTheTonic <wangtao...@huawei.com> Date: 2017-03-13T11:52:36Z add a random integer suffix to blob key to avoid naming conflicting ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---