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Discovering Locators Dynamically |
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Discovering Locators Dynamically
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<p>A background thread periodically queries the locator for any other locators joining the distributed system.</p>
<p>However, if locator A (to which the client is connected) goes down before it discovers locator B, locator B is never discovered even though it is alive and the client receives a <code>NoLocatorsAvailable</code> exception.</p>
<p>One connection is attached to every application thread that is <code>local</code> to the respective thread. This is known as a thread local connection.</p>
<p>In this case, to perform any cache operation the client is not required to obtain a connection from pool. Instead the thread local connection of the client is used.</p>
<p>A thread local connection can be released by invoking the <code>Pool::releaseThreadLocalConnection()</code> method. The released connection is returned to the pool. If the number of threads is larger than the number of <code>max-connections</code>, the client throws an <code>AllConnectionsInUseException</code> after the <code>free-connection-timeout</code> lapses, unless the <code>Pool::releaseThreadLocalConnection()</code> method is used judiciously.</p>
<p>If a connection expires or the server goes down on which the connection was established, a thread local connection is immediately replaced with a good connection obtained from the pool.</p>
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