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Fall back to non-atomic move when removing plugins 

When plugins are installed on a union filesystem (for example, inside a
Docker container), removing them can fail because we attempt an atomic
move which will not work if the plugin is not installed in the top
layer. This commit modifies removing a plugin to fall back to a
non-atomic move in cases when the underlying filesystem does not support
atomic moves.

Relates #23548
This commit is contained in:
Jason Tedor 2017-03-11 19:46:01 -08:00 committed by GitHub
parent 8dfb68cf1c
commit 2a26ae1d6a
1 changed files with 7 additions and 1 deletions
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6
core/src/main/java/org/elasticsearch/plugins/RemovePluginCommand.java
View File

@ -19,6 +19,7 @@
package org.elasticsearch.plugins;
import java.nio.file.AtomicMoveNotSupportedException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
@ -83,7 +84,12 @@ class RemovePluginCommand extends EnvironmentAwareCommand {
terminal.println(VERBOSE, "Removing: " + pluginDir);
final Path tmpPluginDir = env.pluginsFile().resolve(".removing-" + pluginName);
try {
Files.move(pluginDir, tmpPluginDir, StandardCopyOption.ATOMIC_MOVE);
} catch (final AtomicMoveNotSupportedException e) {
// this can happen on a union filesystem when a plugin is not installed on the top layer; we fall back to a non-atomic move
Files.move(pluginDir, tmpPluginDir);
}
pluginPaths.add(tmpPluginDir);
IOUtils.rm(pluginPaths.toArray(new Path[pluginPaths.size()]));