diff --git a/modules/core/src/main/java/org/apache/ignite/configuration/DataStorageConfiguration.java b/modules/core/src/main/java/org/apache/ignite/configuration/DataStorageConfiguration.java
index a6e7a2db23b29..10bd7b1fb869e 100644
--- a/modules/core/src/main/java/org/apache/ignite/configuration/DataStorageConfiguration.java
+++ b/modules/core/src/main/java/org/apache/ignite/configuration/DataStorageConfiguration.java
@@ -23,6 +23,7 @@
 import org.apache.ignite.internal.processors.cache.persistence.file.AsyncFileIOFactory;
 import org.apache.ignite.internal.processors.cache.persistence.file.FileIOFactory;
 import org.apache.ignite.internal.processors.cache.persistence.file.RandomAccessFileIOFactory;
+import org.apache.ignite.internal.util.tostring.GridToStringExclude;
 import org.apache.ignite.internal.util.tostring.GridToStringInclude;
 import org.apache.ignite.internal.util.typedef.internal.A;
 import org.apache.ignite.internal.util.typedef.internal.S;
@@ -301,6 +302,7 @@ public class DataStorageConfiguration implements Serializable {
     private boolean alwaysWriteFullPages = DFLT_WAL_ALWAYS_WRITE_FULL_PAGES;
 
     /** Factory to provide I/O interface for data storage files */
+    @GridToStringExclude
     private FileIOFactory fileIOFactory =
         IgniteSystemProperties.getBoolean(IGNITE_USE_ASYNC_FILE_IO_FACTORY, DFLT_USE_ASYNC_FILE_IO_FACTORY) ?
             new AsyncFileIOFactory() : new RandomAccessFileIOFactory();
diff --git a/modules/core/src/main/java/org/apache/ignite/configuration/EncryptionConfiguration.java b/modules/core/src/main/java/org/apache/ignite/configuration/EncryptionConfiguration.java
index 6b9345d4c7550..320795026ec2e 100644
--- a/modules/core/src/main/java/org/apache/ignite/configuration/EncryptionConfiguration.java
+++ b/modules/core/src/main/java/org/apache/ignite/configuration/EncryptionConfiguration.java
@@ -18,11 +18,14 @@
 package org.apache.ignite.configuration;
 
 import java.io.Serializable;
+
+import org.apache.ignite.internal.util.tostring.GridToStringExclude;
 import org.apache.ignite.internal.util.typedef.internal.A;
 
 /**
  * Encryption configuration.
  */
+@GridToStringExclude
 public class EncryptionConfiguration implements Serializable {
     /** */
     private static final long serialVersionUID = 0L;
diff --git a/modules/core/src/main/java/org/apache/ignite/configuration/IgniteConfiguration.java b/modules/core/src/main/java/org/apache/ignite/configuration/IgniteConfiguration.java
index 16d0bac76cf53..de602002a695a 100644
--- a/modules/core/src/main/java/org/apache/ignite/configuration/IgniteConfiguration.java
+++ b/modules/core/src/main/java/org/apache/ignite/configuration/IgniteConfiguration.java
@@ -49,6 +49,7 @@
 import org.apache.ignite.failure.FailureHandler;
 import org.apache.ignite.internal.managers.eventstorage.GridEventStorageManager;
 import org.apache.ignite.internal.processors.odbc.ClientListenerProcessor;
+import org.apache.ignite.internal.util.tostring.GridToStringExclude;
 import org.apache.ignite.internal.util.typedef.internal.A;
 import org.apache.ignite.internal.util.typedef.internal.S;
 import org.apache.ignite.internal.util.typedef.internal.U;
@@ -326,6 +327,7 @@ public class IgniteConfiguration {
     private String igniteWorkDir;
 
     /** MBean server. */
+    @GridToStringExclude
     private MBeanServer mbeanSrv;
 
     /** Local node ID. */
@@ -410,6 +412,7 @@ public class IgniteConfiguration {
     private LoadBalancingSpi[] loadBalancingSpi;
 
     /** Indexing SPI. */
+    @GridToStringExclude
     private IndexingSpi indexingSpi;
 
     /** Address resolver. */
diff --git a/modules/core/src/main/java/org/apache/ignite/configuration/SystemDataRegionConfiguration.java b/modules/core/src/main/java/org/apache/ignite/configuration/SystemDataRegionConfiguration.java
index bfa20048a7d6e..76b2b1e3a0a59 100644
--- a/modules/core/src/main/java/org/apache/ignite/configuration/SystemDataRegionConfiguration.java
+++ b/modules/core/src/main/java/org/apache/ignite/configuration/SystemDataRegionConfiguration.java
@@ -18,6 +18,7 @@
 
 import java.io.Serializable;
 import org.apache.ignite.internal.util.typedef.internal.A;
+import org.apache.ignite.internal.util.typedef.internal.S;
 
 /**
  * This class allows defining system data region configuration with various parameters for Apache Ignite
@@ -90,4 +91,9 @@ public SystemDataRegionConfiguration setMaxSize(long maxSize) {
 
         return this;
     }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return S.toString(SystemDataRegionConfiguration.class, this);
+    }
 }
diff --git a/modules/core/src/main/java/org/apache/ignite/marshaller/IgniteMarshallerClassFilter.java b/modules/core/src/main/java/org/apache/ignite/marshaller/IgniteMarshallerClassFilter.java
index 2c215465f9b5f..bc6c20b1a9039 100644
--- a/modules/core/src/main/java/org/apache/ignite/marshaller/IgniteMarshallerClassFilter.java
+++ b/modules/core/src/main/java/org/apache/ignite/marshaller/IgniteMarshallerClassFilter.java
@@ -67,4 +67,9 @@ public IgniteMarshallerClassFilter(ClassSet whiteList, ClassSet blackList) {
     @Override public int hashCode() {
         return Objects.hash(whiteList, blackList);
     }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return "IgniteMarshallerClassFilter";
+    }
 }
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/collision/noop/NoopCollisionSpi.java b/modules/core/src/main/java/org/apache/ignite/spi/collision/noop/NoopCollisionSpi.java
index a7c7feef2b3b9..1400a417777d1 100644
--- a/modules/core/src/main/java/org/apache/ignite/spi/collision/noop/NoopCollisionSpi.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/collision/noop/NoopCollisionSpi.java
@@ -17,7 +17,6 @@
 
 package org.apache.ignite.spi.collision.noop;
 
-import org.apache.ignite.internal.util.typedef.internal.S;
 import org.apache.ignite.spi.IgniteSpiAdapter;
 import org.apache.ignite.spi.IgniteSpiException;
 import org.apache.ignite.spi.IgniteSpiMultipleInstancesSupport;
@@ -67,6 +66,6 @@ public class NoopCollisionSpi extends IgniteSpiAdapter implements CollisionSpi {
 
     /** {@inheritDoc} */
     @Override public String toString() {
-        return S.toString(NoopCollisionSpi.class, this);
+        return "NoopCollisionSpi";
     }
 }
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/communication/tcp/TcpCommunicationSpi.java b/modules/core/src/main/java/org/apache/ignite/spi/communication/tcp/TcpCommunicationSpi.java
index cf1a42cf8402c..3078e20a0e9fc 100755
--- a/modules/core/src/main/java/org/apache/ignite/spi/communication/tcp/TcpCommunicationSpi.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/communication/tcp/TcpCommunicationSpi.java
@@ -54,7 +54,7 @@
 import org.apache.ignite.internal.util.nio.GridNioServer;
 import org.apache.ignite.internal.util.nio.GridNioSession;
 import org.apache.ignite.internal.util.nio.GridNioSessionMetaKey;
-import org.apache.ignite.internal.util.typedef.internal.S;
+import org.apache.ignite.internal.util.tostring.GridToStringInclude;
 import org.apache.ignite.internal.util.typedef.internal.U;
 import org.apache.ignite.internal.worker.WorkersRegistry;
 import org.apache.ignite.lang.IgniteFuture;
@@ -194,6 +194,7 @@
  */
 @IgniteSpiMultipleInstancesSupport(true)
 @IgniteSpiConsistencyChecked(optional = false)
+@GridToStringInclude
 public class TcpCommunicationSpi extends TcpCommunicationConfigInitializer {
     /** Node attribute that is mapped to node IP addresses (value is <tt>comm.tcp.addrs</tt>). */
     public static final String ATTR_ADDRS = "comm.tcp.addrs";
@@ -1153,7 +1154,10 @@ public void simulateNodeFailure() {
 
     /** {@inheritDoc} */
     @Override public String toString() {
-        return S.toString(TcpCommunicationSpi.class, this);
+        return "TcpCommunicationSpi [" +
+                "ctxInitLatch=" + ctxInitLatch.getCount() +
+                ", stopping=" + stopping +
+                "]";
     }
 
     /**
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
index f11ab667db0c2..2bd434080eae8 100644
--- a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
@@ -255,6 +255,7 @@ class ServerImpl extends TcpDiscoveryImpl {
     private long connCheckTick;
 
     /** */
+    @GridToStringExclude
     private final IgniteThreadPoolExecutor utilityPool;
 
     /** Pool size to ping remote DC if a corner node loses the ring connection. */
@@ -292,6 +293,7 @@ class ServerImpl extends TcpDiscoveryImpl {
     private StatisticsPrinter statsPrinter;
 
     /** Metric for max message queue size. */
+    @GridToStringExclude
     private MaxValueMetric maxMsgQueueSizeMetric;
 
     /** Failed nodes (but still in topology). */
@@ -310,6 +312,7 @@ class ServerImpl extends TcpDiscoveryImpl {
     private Queue<TcpDiscoveryCustomEventMessage> pendingCustomMsgs = new ArrayDeque<>();
 
     /** Messages history used for client reconnect. */
+    @GridToStringExclude
     private final EnsuredMessageHistory msgHist = new EnsuredMessageHistory();
 
     /** If non-shared IP finder is used this flag shows whether IP finder contains local address. */
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
index 6e14dfa8f272f..b005c79d3765b 100644
--- a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoverySpi.java
@@ -350,9 +350,11 @@ public class TcpDiscoverySpi extends IgniteSpiAdapter implements IgniteDiscovery
     protected long connRecoveryTimeout = DFLT_CONNECTION_RECOVERY_TIMEOUT;
 
     /** Grid discovery listener. */
+    @GridToStringExclude
     protected volatile DiscoverySpiListener lsnr;
 
     /** Data exchange. */
+    @GridToStringExclude
     protected DiscoverySpiDataExchange exchange;
 
     /** Metrics provider. */
@@ -383,6 +385,7 @@ public class TcpDiscoverySpi extends IgniteSpiAdapter implements IgniteDiscovery
     private Marshaller marsh;
 
     /** Statistics. */
+    @GridToStringExclude
     protected final TcpDiscoveryStatistics stats = new TcpDiscoveryStatistics();
 
     /** Local port which node uses. */
@@ -455,9 +458,11 @@ public class TcpDiscoverySpi extends IgniteSpiAdapter implements IgniteDiscovery
     private IgniteBiTuple<Collection<String>, Collection<String>> addrs;
 
     /** */
+    @GridToStringExclude
     protected IgniteSpiContext spiCtx;
 
     /** Discovery messages factory. */
+    @GridToStringExclude
     private MessageFactory msgFactory;
 
     /** For test purposes. */
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/encryption/keystore/KeystoreEncryptionSpi.java b/modules/core/src/main/java/org/apache/ignite/spi/encryption/keystore/KeystoreEncryptionSpi.java
index 7613c5bccc664..1f2e1b244e913 100644
--- a/modules/core/src/main/java/org/apache/ignite/spi/encryption/keystore/KeystoreEncryptionSpi.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/encryption/keystore/KeystoreEncryptionSpi.java
@@ -546,4 +546,9 @@ private KeystoreEncryptionKey loadMasterKey(String masterKeyName) {
             throw new IgniteSpiException(e);
         }
     }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return "KeystoreEncryptionSpi";
+    }
 }
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/encryption/noop/NoopEncryptionSpi.java b/modules/core/src/main/java/org/apache/ignite/spi/encryption/noop/NoopEncryptionSpi.java
index 31e52498b32c8..13e6d51aca54e 100644
--- a/modules/core/src/main/java/org/apache/ignite/spi/encryption/noop/NoopEncryptionSpi.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/encryption/noop/NoopEncryptionSpi.java
@@ -124,4 +124,9 @@ public class NoopEncryptionSpi extends IgniteSpiAdapter implements EncryptionSpi
     @Override public void spiStop() throws IgniteSpiException {
         // No-op.
     }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return "NoopEncryptionSpi";
+    }
 }
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/tracing/NoopTracingSpi.java b/modules/core/src/main/java/org/apache/ignite/spi/tracing/NoopTracingSpi.java
index c12714bc5e60d..23a51c0120479 100644
--- a/modules/core/src/main/java/org/apache/ignite/spi/tracing/NoopTracingSpi.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/tracing/NoopTracingSpi.java
@@ -67,4 +67,9 @@ public class NoopTracingSpi extends IgniteSpiAdapter implements TracingSpi<NoopS
     @Override public byte type() {
         return TracingSpiType.NOOP_TRACING_SPI.index();
     }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return "NoopTracingSpi";
+    }
 }
diff --git a/modules/core/src/test/java/org/apache/ignite/configuration/IgniteConfigurationTest.java b/modules/core/src/test/java/org/apache/ignite/configuration/IgniteConfigurationTest.java
new file mode 100644
index 0000000000000..80eb1bf2275ce
--- /dev/null
+++ b/modules/core/src/test/java/org/apache/ignite/configuration/IgniteConfigurationTest.java
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.configuration;
+
+import java.util.regex.Pattern;
+import org.apache.ignite.internal.IgniteEx;
+import org.apache.ignite.testframework.ListeningTestLogger;
+import org.apache.ignite.testframework.LogListener;
+import org.apache.ignite.testframework.junits.WithSystemProperty;
+import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
+import org.junit.Assert;
+import org.junit.Test;
+
+import static org.apache.ignite.IgniteSystemProperties.IGNITE_QUIET;
+
+/**
+ * Test covers cases where Ignite configuration,
+ * or it's nested objects has default implementation of {@link Object#toString()}
+ */
+@WithSystemProperty(key = IGNITE_QUIET, value = "false")
+public class IgniteConfigurationTest extends GridCommonAbstractTest {
+    /** Error message to be prompted for ignite configuration */
+    private static final String ASSERTION_ERROR_MESSAGE =
+            "Ignite configuration log message contains objects with default toString implementation";
+
+    /** Error message to be prompted for node start log message */
+    private static final String NODE_START_ASSERTION_ERROR_MESSAGE =
+            "Node start log message contains objects with default toString implementation";
+
+    /** Pattern to check any object has default {@link Object#toString()} implementation */
+    private static final Pattern ERROR_PATTERN = Pattern.compile("^(?=.*IgniteConfiguration \\[)(?!.*@[a-fA-F0-9]+).*$");
+
+    /** Pattern to check any object has default {@link Object#toString()} implementation */
+    private static final Pattern NODE_START_ERROR_PATTERN = Pattern.compile("^(?=.*Node started with the following configuration \\[id=)(?!.*@[a-fA-F0-9]+).*$");
+
+    /** */
+    private final ListeningTestLogger listeningLog = new ListeningTestLogger(log);
+
+    /**
+     * Check ignite configuration log message contains no @ letters
+     * It's a common way to ensure all objects in prompt has {@link Object#toString()} overriden
+     */
+    @Test
+    public void testIgniteConfigurationPrompt() throws Exception {
+        LogListener igniteConfigurationLogListener = LogListener
+                .matches(ERROR_PATTERN)
+                .build();
+        LogListener nodeStartIgniteConfigurationLogListener = LogListener
+                .matches(NODE_START_ERROR_PATTERN)
+                .build();
+        listeningLog.registerListener(igniteConfigurationLogListener);
+        listeningLog.registerListener(nodeStartIgniteConfigurationLogListener);
+        try (IgniteEx ignored = startGrid(0)) {
+            Assert.assertTrue(ASSERTION_ERROR_MESSAGE, igniteConfigurationLogListener.check());
+            Assert.assertTrue(NODE_START_ASSERTION_ERROR_MESSAGE, nodeStartIgniteConfigurationLogListener.check(10_000));
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override protected IgniteConfiguration getConfiguration(String igniteInstanceName) throws Exception {
+        return super.getConfiguration(igniteInstanceName)
+                .setGridLogger(listeningLog);
+    }
+}
diff --git a/modules/core/src/test/java/org/apache/ignite/testframework/junits/GridAbstractTest.java b/modules/core/src/test/java/org/apache/ignite/testframework/junits/GridAbstractTest.java
index 039309f866388..109976c727654 100755
--- a/modules/core/src/test/java/org/apache/ignite/testframework/junits/GridAbstractTest.java
+++ b/modules/core/src/test/java/org/apache/ignite/testframework/junits/GridAbstractTest.java
@@ -1324,7 +1324,7 @@ protected Ignite startGrid(String igniteInstanceName, IgniteConfiguration cfg, G
 
                 IgniteConfiguration nodeCfg = node.configuration();
 
-                log.info("Node started with the following configuration [id=" + node.cluster().localNode().id()
+                nodeCfg.getGridLogger().getLogger(getClass().getName()).info("Node started with the following configuration [id=" + node.cluster().localNode().id()
                     + ", discovery=" + nodeCfg.getDiscoverySpi()
                     + ", binaryCfg=" + nodeCfg.getBinaryConfiguration()
                     + ", lateAff=" + nodeCfg.isLateAffinityAssignment() + "]");
diff --git a/modules/core/src/test/java/org/apache/ignite/testsuites/IgniteBasicTestSuite2.java b/modules/core/src/test/java/org/apache/ignite/testsuites/IgniteBasicTestSuite2.java
index def9e319d2310..9b5ca62ce8523 100644
--- a/modules/core/src/test/java/org/apache/ignite/testsuites/IgniteBasicTestSuite2.java
+++ b/modules/core/src/test/java/org/apache/ignite/testsuites/IgniteBasicTestSuite2.java
@@ -19,6 +19,7 @@
 
 import org.apache.ignite.ClassPathContentLoggingTest;
 import org.apache.ignite.cache.RemoveAllDeadlockTest;
+import org.apache.ignite.configuration.IgniteConfigurationTest;
 import org.apache.ignite.events.ClusterActivationStartedEventTest;
 import org.apache.ignite.failure.ExchangeTaskHandlerWaitingForTasksTest;
 import org.apache.ignite.failure.FailureHandlerTriggeredTest;
@@ -227,6 +228,8 @@
 
     FreeListCutTailDifferentGcTest.class,
     MdcCacheReadRequestsRoutingTest.class,
+
+    IgniteConfigurationTest.class,
 })
 public class IgniteBasicTestSuite2 {
 }
diff --git a/modules/opencensus/src/main/java/org/apache/ignite/spi/tracing/opencensus/OpenCensusTracingSpi.java b/modules/opencensus/src/main/java/org/apache/ignite/spi/tracing/opencensus/OpenCensusTracingSpi.java
index 1e3a8611483fb..fead798a3cca3 100644
--- a/modules/opencensus/src/main/java/org/apache/ignite/spi/tracing/opencensus/OpenCensusTracingSpi.java
+++ b/modules/opencensus/src/main/java/org/apache/ignite/spi/tracing/opencensus/OpenCensusTracingSpi.java
@@ -151,4 +151,10 @@ public OpenCensusTracingSpi(SpanExporter.Handler... exporters) {
     @Override public byte type() {
         return TracingSpiType.OPEN_CENSUS_TRACING_SPI.index();
     }
+
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return "OpenCensusTracingSpi";
+    }
 }