[mesos] 04/08: Made copy backend destroy more robust.

[gilbert]

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gilbert pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mesos.git

commit 3e4e78009d94c15409735ecf4bc2941ec7523d6b
Author: Jie Yu <yujie....@gmail.com>
AuthorDate: Fri Aug 31 22:29:48 2018 -0700

    Made copy backend destroy more robust.
    
    Do not return hard failure if `rm -rf` failed. It's also possible that
    it fails if some other processes are accessing the files there. The
    cleanup will be re-attempted during provisioner destroy and agent
    recovery.
    
    Review: https://reviews.apache.org/r/68597/
---
 src/slave/containerizer/mesos/provisioner/backends/copy.cpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/slave/containerizer/mesos/provisioner/backends/copy.cpp 
b/src/slave/containerizer/mesos/provisioner/backends/copy.cpp
index d3eb6b4..a3237a3 100644
--- a/src/slave/containerizer/mesos/provisioner/backends/copy.cpp
+++ b/src/slave/containerizer/mesos/provisioner/backends/copy.cpp
@@ -326,9 +326,15 @@ Future<bool> CopyBackendProcess::destroy(const string& 
rootfs)
     .then([](const Option<int>& status) -> Future<bool> {
       if (status.isNone()) {
         return Failure("Failed to reap subprocess to destroy rootfs");
-      } else if (status.get() != 0) {
-        return Failure("Failed to destroy rootfs, exit status: " +
-                       WSTRINGIFY(status.get()));
+      }
+
+      if (status.get() != 0) {
+        // It's possible that `rm -rf` will fail if some other
+        // programs are accessing the files.  No need to return a hard
+        // failure here because the directory will be removed later
+        // and re-attempted on agent recovery.
+        LOG(ERROR) << "Failed to destroy rootfs, exit status: "
+                   << WSTRINGIFY(status.get());
       }
 
       return true;