|  | Release notes for Gerrit 2.9.3 | 
|  | ============================== | 
|  |  | 
|  | Download: | 
|  | link:https://gerrit-releases.storage.googleapis.com/gerrit-2.9.3.war[ | 
|  | https://gerrit-releases.storage.googleapis.com/gerrit-2.9.3.war] | 
|  |  | 
|  | Important Notes | 
|  | --------------- | 
|  |  | 
|  | *WARNING:* There are no schema changes from | 
|  | link:ReleaseNotes-2.9.2.html[2.9.2], but when upgrading from an existing site | 
|  | that was initialized with Gerrit version 2.6 to version 2.9.1 the primary key | 
|  | column order will be updated for some tables. It is therefore important to | 
|  | upgrade the site with the `init` program, rather than only copying the .war file | 
|  | over the existing one. | 
|  |  | 
|  | It is recommended to run the `init` program in interactive mode. Warnings will | 
|  | be suppressed in batch mode. | 
|  |  | 
|  | ---- | 
|  | java -jar gerrit.war init -d site_path | 
|  | ---- | 
|  |  | 
|  | *WARNING:* When upgrading from version 2.8.4 or older with a site that uses | 
|  | Bouncy Castle Crypto, new versions of the libraries will be downloaded. The old | 
|  | libraries should be manually removed from site's `lib` folder to prevent the | 
|  | startup failure described in | 
|  | link:https://code.google.com/p/gerrit/issues/detail?id=3084[Issue 3084]. | 
|  |  | 
|  | Bug Fixes | 
|  | --------- | 
|  |  | 
|  | *Downgrade SSHD to 0.9.0-4-g5967cfd* | 
|  |  | 
|  | In Gerrit version 2.9.2 SSHD was upgraded to 0.13.0 which included a fix for | 
|  | link:https://issues.apache.org/jira/browse/SSHD-348[SSHD-348 (SSH thread pool | 
|  | exhaustion)]. | 
|  |  | 
|  | It turned out that SSHD 0.13.0 still suffers from this issue, which causes | 
|  | problems for users of the stream-events in Gerrit 2.9.2. | 
|  |  | 
|  | SSHD 0.9.0 is known to be free from this particular issue, but we cannot | 
|  | downgrade to that version because it includes some other known issues: | 
|  |  | 
|  | * link:https://issues.apache.org/jira/browse/SSHD-254[SSHD-254 ('authenticated | 
|  | with partial success' error)] | 
|  | * link:https://issues.apache.org/jira/browse/SSHD-330[SSHD-330 (sporadic | 
|  | handshake failures)]. | 
|  |  | 
|  | SSHD version 0.9.0-4-g5967cfd is based on 0.9.0 and includes fixes for SSHD-254 | 
|  | and SSHD-330. | 
|  |  | 
|  | Due to the downgrade of SSHD, the following libraries are also downgraded: | 
|  |  | 
|  | * Bouncycastle from 1.51 to 1.49 | 
|  | * Mina Core from 2.0.8 to 2.0.7 |