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<h2 title="Class InsufficientAcksException" class="title">Class InsufficientAcksException</h2>
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<pre>public class <span class="typeNameLabel">InsufficientAcksException</span>
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extends <a href="../../../../com/sleepycat/je/OperationFailureException.html" title="class in com.sleepycat.je">OperationFailureException</a></pre>
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<div class="block"><p>
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This exception is thrown at the time of a commit in a Master, if the Master
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could not obtain transaction commit acknowledgments from its Replicas in
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accordance with the <a href="../../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je"><code>Durability.ReplicaAckPolicy</code></a> currently in effect and within
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the requested timeout interval. This exception will never be thrown when the
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<code>ReplicaAckPolicy</code> of <a href="../../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html#NONE"><code>NONE</code></a> is in effect.
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<p>
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Note that an <a href="../../../../com/sleepycat/je/rep/InsufficientAcksException.html" title="class in com.sleepycat.je.rep"><code>InsufficientAcksException</code></a> means the transaction has
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already committed at the master. The transaction may also have been
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committed at one or more Replicas, but the lack of replica acknowledgments
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means that the number of replicas that committed could not be
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established. If the transaction was in fact committed by less than a simple
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majority of the nodes, it could result in a <a href="../../../../com/sleepycat/je/rep/RollbackException.html" title="class in com.sleepycat.je.rep"><code>RollbackException</code></a> when
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the node subsequently attempts to rejoin the group as a Replica.
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<p>
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The application can handle the exception and choose to respond in a number
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of ways. For example, it can
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<ul>
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<li>do nothing, assuming that the transaction will eventually propagate to
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enough replicas to become durable,
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<li>retry the operation in a new transaction, which may succeed or fail
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depending on whether the underlying problems have been resolved,
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<li>retry using a larger timeout interval and return to the original
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timeout interval at a later time,
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<li>fall back temporarily to a read-only mode,
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<li>increase the durability of the transaction on the Master by ensuring
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that the changes are flushed to the operating system's buffers or to
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the disk, or
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<li>give up and report an error at a higher level, perhaps to allow an
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administrator to check the underlying cause of the failure.
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</ul></div>
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<dt><span class="seeLabel">See Also:</span></dt>
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<dd><a href="../../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je"><code>Durability</code></a>,
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<a href="../../../../serialized-form.html#com.sleepycat.je.rep.InsufficientAcksException">Serialized Form</a></dd>
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/sleepycat/je/rep/InsufficientAcksException.html#acksPending--">acksPending</a></span>()</code>
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<div class="block">It returns the number of Replicas that did not respond with an
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acknowledgment within the Replica commit timeout period.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/sleepycat/je/rep/InsufficientAcksException.html#acksRequired--">acksRequired</a></span>()</code>
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<div class="block">It returns the number of acknowledgments required by the commit policy.</div>
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</td>
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</tr>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/sleepycat/je/rep/InsufficientAcksException.html#ackTimeout--">ackTimeout</a></span>()</code>
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<div class="block">Returns the acknowledgment timeout that was in effect at the time of the
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exception.</div>
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<h3>Methods inherited from class com.sleepycat.je.<a href="../../../../com/sleepycat/je/DatabaseException.html" title="class in com.sleepycat.je">DatabaseException</a></h3>
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<code><a href="../../../../com/sleepycat/je/DatabaseException.html#getMessage--">getMessage</a></code></li>
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<h4>acksPending</h4>
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<pre>public int acksPending()</pre>
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<div class="block">It returns the number of Replicas that did not respond with an
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acknowledgment within the Replica commit timeout period.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of missing acknowledgments</dd>
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</dl>
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<h4>acksRequired</h4>
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<pre>public int acksRequired()</pre>
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<div class="block">It returns the number of acknowledgments required by the commit policy.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of acknowledgments required</dd>
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</dl>
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<h4>ackTimeout</h4>
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<pre>public int ackTimeout()</pre>
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<div class="block">Returns the acknowledgment timeout that was in effect at the time of the
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exception.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the acknowledgment timeout in milliseconds</dd>
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<div class="aboutLanguage"><b>Berkeley DB Java Edition</b><br><font size=\"-1\"> version 7.5.11</font>
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