Fix typo

2 files changed, 3 insertions, 3 deletions

diff --git a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/DelegatingOsUpgrader.java b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/DelegatingOsUpgrader.java
index 5d8296d6f9d..bd7f39b1f6e 100644
--- a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/DelegatingOsUpgrader.java
+++ b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/DelegatingOsUpgrader.java
@@ -38,7 +38,7 @@ public class DelegatingOsUpgrader extends OsUpgrader {
                                              .matching(node -> canUpgradeTo(target.version(), now, node))
                                              .byIncreasingOsVersion()
                                              .first(upgradeSlots(target, activeNodes));
-        if (nodesToUpgrade.size() == 0) return;
+        if (nodesToUpgrade.isEmpty()) return;
         LOG.info("Upgrading " + nodesToUpgrade.size() + " nodes of type " + target.nodeType() + " to OS version " +
                  target.version().toFullString());
         nodeRepository.nodes().upgradeOs(NodeListFilter.from(nodesToUpgrade.asList()), Optional.of(target.version()));
@@ -49,7 +49,7 @@ public class DelegatingOsUpgrader extends OsUpgrader {
         NodeList nodesUpgrading = nodeRepository.nodes().list()
                                                 .nodeType(type)
                                                 .changingOsVersion();
-        if (nodesUpgrading.size() == 0) return;
+        if (nodesUpgrading.isEmpty()) return;
         LOG.info("Disabling OS upgrade of all " + type + " nodes");
         nodeRepository.nodes().upgradeOs(NodeListFilter.from(nodesUpgrading.asList()), Optional.empty());
     }
diff --git a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/OsUpgrader.java b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/OsUpgrader.java
index f56e75518a3..2f09a0a5a29 100644
--- a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/OsUpgrader.java
+++ b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/os/OsUpgrader.java
@@ -44,7 +44,7 @@ public abstract class OsUpgrader {
     /** Returns the number of upgrade slots available for given target */
     final int upgradeSlots(OsVersionTarget target, NodeList candidates) {
         if (!candidates.stream().allMatch(node -> node.type() == target.nodeType())) {
-            throw new IllegalArgumentException("All node types must type of OS version target " + target.nodeType());
+            throw new IllegalArgumentException("All node types must match type of OS version target " + target.nodeType());
         }
         int max = target.nodeType() == NodeType.host ? maxActiveUpgrades.value() : 1;
         int upgrading = candidates.changingOsVersionTo(target.version()).size();