[[breaking_50_plugins]] === Plugin changes The command `bin/plugin` has been renamed to `bin/elasticsearch-plugin`. The structure of the plugin ZIP archive has changed. All the plugin files must be contained in a top-level directory called `elasticsearch`. If you use the gradle build, this structure is automatically generated. ==== Plugins isolation `isolated` option has been removed. Each plugin will have its own classloader. ==== Site plugins removed Site plugins have been removed. Site plugins should be reimplemented as Kibana plugins. ==== Multicast plugin removed Multicast has been removed. Use unicast discovery, or one of the cloud discovery plugins. ==== Plugins with custom query implementations Plugins implementing custom queries need to implement the `fromXContent(QueryParseContext)` method in their `QueryParser` subclass rather than `parse`. This method will take care of parsing the query from `XContent` format into an intermediate query representation that can be streamed between the nodes in binary format, effectively the query object used in the java api. Also, the query parser needs to implement the `getBuilderPrototype` method that returns a prototype of the `NamedWriteable` query, which allows to deserialize an incoming query by calling `readFrom(StreamInput)` against it, which will create a new object, see usages of `Writeable`. The `QueryParser` also needs to declare the generic type of the query that it supports and it's able to parse. The query object can then transform itself into a lucene query through the new `toQuery(QueryShardContext)` method, which returns a lucene query to be executed on the data node. Similarly, plugins implementing custom score functions need to implement the `fromXContent(QueryParseContext)` method in their `ScoreFunctionParser` subclass rather than `parse`. This method will take care of parsing the function from `XContent` format into an intermediate function representation that can be streamed between the nodes in binary format, effectively the function object used in the java api. Also, the query parser needs to implement the `getBuilderPrototype` method that returns a prototype of the `NamedWriteable` function, which allows to deserialize an incoming function by calling `readFrom(StreamInput)` against it, which will create a new object, see usages of `Writeable`. The `ScoreFunctionParser` also needs to declare the generic type of the function that it supports and it's able to parse. The function object can then transform itself into a lucene function through the new `toFunction(QueryShardContext)` method, which returns a lucene function to be executed on the data node. ==== Cloud AWS plugin changes Cloud AWS plugin has been split in two plugins: * {plugins}/discovery-ec2.html[Discovery EC2 plugin] * {plugins}/repository-s3.html[Repository S3 plugin] Proxy settings for both plugins have been renamed: * from `cloud.aws.proxy_host` to `cloud.aws.proxy.host` * from `cloud.aws.ec2.proxy_host` to `cloud.aws.ec2.proxy.host` * from `cloud.aws.s3.proxy_host` to `cloud.aws.s3.proxy.host` * from `cloud.aws.proxy_port` to `cloud.aws.proxy.port` * from `cloud.aws.ec2.proxy_port` to `cloud.aws.ec2.proxy.port` * from `cloud.aws.s3.proxy_port` to `cloud.aws.s3.proxy.port` ==== Cloud Azure plugin changes Cloud Azure plugin has been split in three plugins: * {plugins}/discovery-azure.html[Discovery Azure plugin] * {plugins}/repository-azure.html[Repository Azure plugin] * {plugins}/store-smb.html[Store SMB plugin] If you were using the `cloud-azure` plugin for snapshot and restore, you had in `elasticsearch.yml`: [source,yaml] ----- cloud: azure: storage: account: your_azure_storage_account key: your_azure_storage_key ----- You need to give a unique id to the storage details now as you can define multiple storage accounts: [source,yaml] ----- cloud: azure: storage: my_account: account: your_azure_storage_account key: your_azure_storage_key ----- ==== Cloud GCE plugin changes Cloud GCE plugin has been renamed to {plugins}/discovery-gce.html[Discovery GCE plugin]. ==== Delete-By-Query plugin removed The Delete-By-Query plugin has been removed in favor of a new <> implementation in core. It now supports throttling, retries and cancellation but no longer supports timeouts. Instead use the <> to cancel deletes that run too long. ==== Mapper Attachments plugin deprecated Mapper attachments has been deprecated. Users should use now the {plugins}/ingest-attachment.html[`ingest-attachment`] plugin. ==== Passing of Java System Properties Previously, Java system properties could be passed to the plugin command by passing `-D` style arguments directly to the plugin script. This is no longer permitted and such system properties must be passed via ES_JAVA_OPTS. ==== Custom plugins path The ability to specify a custom plugins path via `path.plugins` has been removed.