Result window is too large, from + size must be less than or equal to: [10000] but was [100000]. See the scroll api for a more efficient way to request large data sets. This limit can be set by changing the [index.max_result_window] index level parameter

Upon upgrading elasticsearch to 2.1.0 I tried to do an export by pulling in a lot of records in one go and got the following error:

Result window is too large, from + size must be less than or equal to: [10000] but was [100000]. See the scroll api for a more efficient way to request large data sets. This limit can be set by changing the [index.max_result_window] index level parameter

I suppose the proper fix would be to modify the code to use the scroll API, but for a quick fix, you can use the following:

 curl -XPUT http://1.2.3.4:9200/index/_settings -d '{ "index" : { "max_result_window" : 1000000}}'

Reference:

https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules.html

elasticsearch 2.1.0 and "Unable to get effective rights from ACL: Overlapped I/O operation is in progress" error

When starting elasticsearch 2.1.0 on Windows 7 I got the following error below:

Likely root cause: java.io.IOException: Unable to get effective rights from ACL: Overlapped I/O operation is in progress.

        at sun.nio.fs.WindowsFileSystemProvider.getEffectiveAccess(WindowsFileSystemProvider.java:344)
        at sun.nio.fs.WindowsFileSystemProvider.checkAccess(WindowsFileSystemProvider.java:397)
        at org.elasticsearch.bootstrap.Security.ensureDirectoryExists(Security.java:246)
        at org.elasticsearch.bootstrap.Security.addPath(Security.java:227)
        at org.elasticsearch.bootstrap.Security.addFilePermissions(Security.java:191)
        at org.elasticsearch.bootstrap.Security.createPermissions(Security.java:184)
        at org.elasticsearch.bootstrap.Security.configure(Security.java:105)
        at org.elasticsearch.bootstrap.Bootstrap.setupSecurity(Bootstrap.java:196)
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:167)
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:285)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35)

When I checked the java version being used I found it was using jdk1.7.0_21

echo %JAVA_HOME%

Upgrading to jdk1.8.0_65 resolved the issue