[TINKERPOP-2176] Incorrect decision of host unavailable in Java client

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.4.0, 3.3.5
• Component/s: driver
• Assignee: Unassigned
• Reporter: Divij Vaidya
• Created: 08/Mar/19 23:20
• Updated: 09/Jan/20 18:12

Description

If a request is not able to acquire a connection from the connection pool for a particular duration, it will fail with a Timeout Exception and also mark the host as unreachable [1] which is not necessarily true. A request might not be able to get a connection from the pool because the pool configuration has been set to a very low number or all the connections are genuinely busy serving existing requests. It does not imply host being unreachable.

[1]https://github.com/apache/tinkerpop/blob/9e4078983bb41a66f17cd33d599168a8ec78295b/gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/ConnectionPool.java#L375

Issue Links

• is duplicated by: TINKERPOP-2255 Improve reliability of availableHosts()