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KAFKA-19480: Add workaround for hanging kraft migration due to null /migration znode #708

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KAFKA-19480: Add workaround for hanging kraft migration due to null /migration znode #708

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KAFKA-19480: Add workaround for hanging kraft migration due to null /…
harmadasg Jul 31, 2025
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KAFKA-19480: clarify workaround steps mentioning the name of the tool
harmadasg Aug 14, 2025
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2 changes: 2 additions & 0 deletions 34/ops.html
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Expand Up @@ -3685,6 +3685,8 @@ <h3>Provisioning the KRaft controller quorum</h3>

# Other configs ...</pre>

<p>Note: The migration can stall if the <a href="#zk_authz_migration">ZooKeeper Security Migration Tool</a> was previously executed (see <a href="https://issues.apache.org/jira/browse/KAFKA-19480">KAFKA-19026</a> for more details). As a workaround, the malformed "/migration" node can be removed from ZooKeeper by running <code>delete /migration</code> with the <code>zookeeper-shell.sh</code> CLI tool.</p>

<p><em>Note: The KRaft cluster <code>node.id</code> values must be different from any existing ZK broker <code>broker.id</code>.
In KRaft-mode, the brokers and controllers share the same Node ID namespace.</em></p>

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2 changes: 2 additions & 0 deletions 35/ops.html
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Expand Up @@ -3704,6 +3704,8 @@ <h3>Provisioning the KRaft controller quorum</h3>

# Other configs ...</pre>

<p>Note: The migration can stall if the <a href="#zk_authz_migration">ZooKeeper Security Migration Tool</a> was previously executed (see <a href="https://issues.apache.org/jira/browse/KAFKA-19480">KAFKA-19026</a> for more details). As a workaround, the malformed "/migration" node can be removed from ZooKeeper by running <code>delete /migration</code> with the <code>zookeeper-shell.sh</code> CLI tool.</p>

<p><em>Note: The KRaft cluster <code>node.id</code> values must be different from any existing ZK broker <code>broker.id</code>.
In KRaft-mode, the brokers and controllers share the same Node ID namespace.</em></p>

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2 changes: 2 additions & 0 deletions 36/ops.html
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Expand Up @@ -3852,6 +3852,8 @@ <h3>Provisioning the KRaft controller quorum</h3>

# Other configs ...</pre>

<p>Note: The migration can stall if the <a href="#zk_authz_migration">ZooKeeper Security Migration Tool</a> was previously executed (see <a href="https://issues.apache.org/jira/browse/KAFKA-19480">KAFKA-19026</a> for more details). As a workaround, the malformed "/migration" node can be removed from ZooKeeper by running <code>delete /migration</code> with the <code>zookeeper-shell.sh</code> CLI tool.</p>

<p><em>Note: The KRaft cluster <code>node.id</code> values must be different from any existing ZK broker <code>broker.id</code>.
In KRaft-mode, the brokers and controllers share the same Node ID namespace.</em></p>

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2 changes: 2 additions & 0 deletions 37/ops.html
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Expand Up @@ -3928,6 +3928,8 @@ <h3>Provisioning the KRaft controller quorum</h3>

# Other configs ...</pre>

<p>Note: The migration can stall if the <a href="#zk_authz_migration">ZooKeeper Security Migration Tool</a> was previously executed (see <a href="https://issues.apache.org/jira/browse/KAFKA-19480">KAFKA-19026</a> for more details). As a workaround, the malformed "/migration" node can be removed from ZooKeeper by running <code>delete /migration</code> with the <code>zookeeper-shell.sh</code> CLI tool.</p>

<p><em>Note: The KRaft cluster <code>node.id</code> values must be different from any existing ZK broker <code>broker.id</code>.
In KRaft-mode, the brokers and controllers share the same Node ID namespace.</em></p>

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2 changes: 2 additions & 0 deletions 38/ops.html
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Expand Up @@ -3933,6 +3933,8 @@ <h3>Provisioning the KRaft controller quorum</h3>

# Other configs ...</code></pre>

<p>Note: The migration can stall if the <a href="#zk_authz_migration">ZooKeeper Security Migration Tool</a> was previously executed (see <a href="https://issues.apache.org/jira/browse/KAFKA-19480">KAFKA-19026</a> for more details). As a workaround, the malformed "/migration" node can be removed from ZooKeeper by running <code>delete /migration</code> with the <code>zookeeper-shell.sh</code> CLI tool.</p>

<p><em>Note: The KRaft cluster <code>node.id</code> values must be different from any existing ZK broker <code>broker.id</code>.
In KRaft-mode, the brokers and controllers share the same Node ID namespace.</em></p>

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2 changes: 2 additions & 0 deletions 39/ops.html
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Expand Up @@ -4083,6 +4083,8 @@ <h3>Provisioning the KRaft controller quorum</h3>
$ bin/kafka-storage.sh format --standalone -t &lt;zk-cluster-id&gt; -c config/kraft/controller.properties
$ bin/kafka-server-start.sh config/kraft/controller.properties</code></pre>

<p>Note: The migration can stall if the <a href="#zk_authz_migration">ZooKeeper Security Migration Tool</a> was previously executed (see <a href="https://issues.apache.org/jira/browse/KAFKA-19480">KAFKA-19026</a> for more details). As a workaround, the malformed "/migration" node can be removed from ZooKeeper by running <code>delete /migration</code> with the <code>zookeeper-shell.sh</code> CLI tool.</p>

<p><em>Note: The KRaft cluster <code>node.id</code> values must be different from any existing ZK broker <code>broker.id</code>.
In KRaft-mode, the brokers and controllers share the same Node ID namespace.</em></p>

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