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commit 58c6cf8cd76270a9b4d73043d89eb6077a313431
Author: Matthias Boehm <[email protected]>
AuthorDate: Sat Sep 3 19:53:14 2022 +0200

    [MINOR] Cleanup misc warnings and formatting issues
---
 .../compress/colgroup/ADictBasedColGroup.java      |   1 +
 .../federated/monitoring/models/BaseModel.java     |   1 +
 .../models/CoordinatorConnectionModel.java         |   1 +
 .../monitoring/models/CoordinatorModel.java        |   1 +
 .../monitoring/models/DataObjectModel.java         |   2 +-
 .../federated/monitoring/models/EventModel.java    |   2 +-
 .../monitoring/models/EventStageModel.java         |   2 +-
 .../federated/monitoring/models/RequestModel.java  |   2 +-
 .../monitoring/models/StatisticsModel.java         |   1 +
 .../monitoring/models/StatisticsOptions.java       |   1 +
 .../federated/monitoring/models/TrafficModel.java  |   2 +-
 .../monitoring/models/UtilizationModel.java        |   2 +-
 .../federated/monitoring/models/WorkerModel.java   |   1 +
 .../paramserv/FederatedPSControlThread.java        |  23 ++--
 .../paramserv/homomorphicEncryption/PublicKey.java |  18 +--
 .../homomorphicEncryption/SEALServer.java          | 134 ++++++++++-----------
 .../ColGroupMorphingPerformanceCompare.java        |   2 +-
 .../compress/colgroup/ColGroupNegativeTests.java   |   7 ++
 18 files changed, 109 insertions(+), 94 deletions(-)

diff --git 
a/src/main/java/org/apache/sysds/runtime/compress/colgroup/ADictBasedColGroup.java
 
b/src/main/java/org/apache/sysds/runtime/compress/colgroup/ADictBasedColGroup.java
index 0efdb4aa56..dc09fe9877 100644
--- 
a/src/main/java/org/apache/sysds/runtime/compress/colgroup/ADictBasedColGroup.java
+++ 
b/src/main/java/org/apache/sysds/runtime/compress/colgroup/ADictBasedColGroup.java
@@ -35,6 +35,7 @@ import org.apache.sysds.runtime.data.SparseBlock;
 import org.apache.sysds.runtime.matrix.data.MatrixBlock;
 
 public abstract class ADictBasedColGroup extends AColGroupCompressed {
+       private static final long serialVersionUID = -3737025296618703668L;
        /** Distinct value tuples associated with individual bitmaps. */
        protected ADictionary _dict;
 
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/BaseModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/BaseModel.java
index dbd3320c01..3d1f5e9205 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/BaseModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/BaseModel.java
@@ -22,5 +22,6 @@ package 
org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 import java.io.Serializable;
 
 public abstract class BaseModel implements Serializable {
+       private static final long serialVersionUID = 5565981270528383999L;
        public Long id;
 }
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorConnectionModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorConnectionModel.java
index dc28232225..08965ad1b5 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorConnectionModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorConnectionModel.java
@@ -20,6 +20,7 @@
 package org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 
 public abstract class CoordinatorConnectionModel extends BaseModel {
+       private static final long serialVersionUID = 918360814223266197L;
        public Long coordinatorId;
        private String coordinatorHostId;
        private static final String localhostIp = "127.0.0.1";
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorModel.java
index 98f25ee267..08a6938735 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/CoordinatorModel.java
@@ -20,6 +20,7 @@
 package org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 
 public class CoordinatorModel extends BaseModel {
+       private static final long serialVersionUID = 4116787631938152573L;
        public String name;
        public String host;
        public Long processId;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/DataObjectModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/DataObjectModel.java
index 5e20ba2887..c6c14e7390 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/DataObjectModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/DataObjectModel.java
@@ -20,7 +20,7 @@
 package org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 
 public class DataObjectModel extends BaseModel {
-
+       private static final long serialVersionUID = 7914784187151939188L;
        public Long workerId;
        public String varName;
        public String dataType;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventModel.java
index fc4694c935..e3e4dc3398 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventModel.java
@@ -24,7 +24,7 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 public class EventModel extends CoordinatorConnectionModel {
-
+       private static final long serialVersionUID = -5597621916956632690L;
        public Long workerId;
        private String coordinatorName;
        public List<EventStageModel> stages;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventStageModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventStageModel.java
index 1171a7c25c..ee4205a124 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventStageModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/EventStageModel.java
@@ -22,7 +22,7 @@ package 
org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 import java.time.LocalDateTime;
 
 public class EventStageModel extends BaseModel {
-
+       private static final long serialVersionUID = -6867424341266726981L;
        public Long eventId;
        public String operation;
        public LocalDateTime startTime;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/RequestModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/RequestModel.java
index 81171e9311..ff971c129e 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/RequestModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/RequestModel.java
@@ -20,7 +20,7 @@
 package org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 
 public class RequestModel extends CoordinatorConnectionModel {
-
+       private static final long serialVersionUID = -5376072120202921000L;
        public Long workerId;
        public String type;
        public Long count;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsModel.java
index cdbe6e73c5..613b286a27 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsModel.java
@@ -23,6 +23,7 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 public class StatisticsModel extends BaseModel {
+       private static final long serialVersionUID = -2492467768854934429L;
        public List<UtilizationModel> utilization;
        public List<TrafficModel> traffic;
        public List<EventModel> events;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsOptions.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsOptions.java
index bcbc57357d..cbbf4cd915 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsOptions.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/StatisticsOptions.java
@@ -20,6 +20,7 @@
 package org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 
 public class StatisticsOptions extends BaseModel {
+       private static final long serialVersionUID = 2524032122999491726L;
        public int rowCount = 20;
        public boolean utilization = true;
        public boolean traffic = true;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/TrafficModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/TrafficModel.java
index 9d0d1d160e..617324da64 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/TrafficModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/TrafficModel.java
@@ -22,7 +22,7 @@ package 
org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 import java.time.LocalDateTime;
 
 public class TrafficModel extends CoordinatorConnectionModel {
-
+       private static final long serialVersionUID = 5042814368347405998L;
        public Long workerId;
        public LocalDateTime timestamp;
        public Long byteAmount;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/UtilizationModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/UtilizationModel.java
index d92555a3ee..b3b1076814 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/UtilizationModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/UtilizationModel.java
@@ -22,7 +22,7 @@ package 
org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 import java.time.LocalDateTime;
 
 public class UtilizationModel extends BaseModel {
-
+       private static final long serialVersionUID = 6984053518916899551L;
        public Long workerId;
        public LocalDateTime timestamp;
        public double cpuUsage;
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/WorkerModel.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/WorkerModel.java
index 922fe9239a..f1065b1bae 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/WorkerModel.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/federated/monitoring/models/WorkerModel.java
@@ -20,6 +20,7 @@
 package org.apache.sysds.runtime.controlprogram.federated.monitoring.models;
 
 public class WorkerModel extends BaseModel {
+       private static final long serialVersionUID = -7516912892237220796L;
        public String name;
        public String address;
 
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/FederatedPSControlThread.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/FederatedPSControlThread.java
index 0c984698c1..09fd0a3349 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/FederatedPSControlThread.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/FederatedPSControlThread.java
@@ -293,14 +293,14 @@ public class FederatedPSControlThread extends PSWorker 
implements Callable<Void>
 
                byte[] _partial_pubkey_a;
 
-        protected SetupHEFederatedWorker(byte[] partial_pubkey_a) {
-            // delegate everything to parent class. set modelAvg to true, as 
it is the only supported case
-            super();
-            _partial_pubkey_a = partial_pubkey_a;
-        }
-
-        @Override
-        public FederatedResponse execute(ExecutionContext ec, Data... data) {
+               protected SetupHEFederatedWorker(byte[] partial_pubkey_a) {
+                       // delegate everything to parent class. set modelAvg to 
true, as it is the only supported case
+                       super();
+                       _partial_pubkey_a = partial_pubkey_a;
+               }
+
+               @Override
+               public FederatedResponse execute(ExecutionContext ec, Data... 
data) {
                        // TODO: set other CKKS parameters
                        // TODO generate partial public key
                        NativeHEHelper.initialize();
@@ -315,9 +315,10 @@ public class FederatedPSControlThread extends PSWorker 
implements Callable<Void>
                        }
 
                        return new 
FederatedResponse(FederatedResponse.ResponseType.SUCCESS, partial_pubkey);
-        }
-    }
-               /**
+               }
+       }
+       
+       /**
         * Teardown UDF executed on the federated worker
         */
        private static class SetPublicKeyFederatedWorker extends FederatedUDF {
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/PublicKey.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/PublicKey.java
index 96fd415308..bb3dea4db7 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/PublicKey.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/PublicKey.java
@@ -22,15 +22,15 @@ package 
org.apache.sysds.runtime.controlprogram.paramserv.homomorphicEncryption;
 import java.io.Serializable;
 
 public class PublicKey implements Serializable {
-    private static final long serialVersionUID = 91289081237980123L;
+       private static final long serialVersionUID = 91289081237980123L;
 
-    private final byte[] _data;
+       private final byte[] _data;
 
-    public PublicKey(byte[] data) {
-        _data = data;
-    }
-
-    public byte[] getData() {
-        return _data;
-    }
+       public PublicKey(byte[] data) {
+               _data = data;
+       }
+       
+       public byte[] getData() {
+               return _data;
+       }
 }
diff --git 
a/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/SEALServer.java
 
b/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/SEALServer.java
index d6265c7f6d..acf8509d91 100644
--- 
a/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/SEALServer.java
+++ 
b/src/main/java/org/apache/sysds/runtime/controlprogram/paramserv/homomorphicEncryption/SEALServer.java
@@ -35,78 +35,78 @@ import org.apache.sysds.runtime.meta.MetaDataFormat;
 import java.util.Arrays;
 
 public class SEALServer {
-    public SEALServer() {
-        // TODO take params here, like slot_count etc.
-        ctx = NativeHEHelper.initServer();
-    }
+       public SEALServer() {
+               // TODO take params here, like slot_count etc.
+               ctx = NativeHEHelper.initServer();
+       }
 
-    // this is a pointer to the context used by all native methods of this 
class
-    private final long ctx;
-    private byte[] _a;
+       // this is a pointer to the context used by all native methods of this 
class
+       private final long ctx;
+       private byte[] _a;
 
-    /**
-     * this generates the a constant. in a future version we want to generate 
this together with the clients to prevent misuse
-     * @return serialized a constant
-     */
-    public synchronized byte[] generateA() {
-        if (_a == null) {
-            _a = NativeHEHelper.generateA(ctx);
-        }
-        return _a;
-    }
+       /**
+        * this generates the a constant. in a future version we want to 
generate this together with the clients to prevent misuse
+        * @return serialized a constant
+        */
+       public synchronized byte[] generateA() {
+               if (_a == null) {
+                       _a = NativeHEHelper.generateA(ctx);
+               }
+               return _a;
+       }
 
-    /**
-     * accumulates the given partial public keys into a public key, stores it 
in ctx and returns it
-     * @param partial_public_keys an array of partial public keys generated 
with SEALServer::generatePartialPublicKey
-     * @return the aggregated public key
-     */
-    public PublicKey aggregatePartialPublicKeys(PublicKey[] 
partial_public_keys) {
-        return new PublicKey(NativeHEHelper.aggregatePartialPublicKeys(ctx, 
extractRawData(partial_public_keys)));
-    }
+       /**
+        * accumulates the given partial public keys into a public key, stores 
it in ctx and returns it
+        * @param partial_public_keys an array of partial public keys generated 
with SEALServer::generatePartialPublicKey
+        * @return the aggregated public key
+        */
+       public PublicKey aggregatePartialPublicKeys(PublicKey[] 
partial_public_keys) {
+               return new 
PublicKey(NativeHEHelper.aggregatePartialPublicKeys(ctx, 
extractRawData(partial_public_keys)));
+       }
 
-    /**
-     * accumulates the given ciphertext blocks into a sum ciphertext and 
returns it
-     * @param ciphertexts ciphertexts encrypted with the partial public keys
-     * @return the accumulated ciphertext (which is the homomorphic sum of 
ciphertexts)
-     */
-    public CiphertextMatrix accumulateCiphertexts(CiphertextMatrix[] 
ciphertexts) {
-        return new CiphertextMatrix(ciphertexts[0].getDims(), 
ciphertexts[0].getDataCharacteristics(), 
NativeHEHelper.accumulateCiphertexts(ctx, extractRawData(ciphertexts)));
-    }
+       /**
+        * accumulates the given ciphertext blocks into a sum ciphertext and 
returns it
+        * @param ciphertexts ciphertexts encrypted with the partial public keys
+        * @return the accumulated ciphertext (which is the homomorphic sum of 
ciphertexts)
+        */
+       public CiphertextMatrix accumulateCiphertexts(CiphertextMatrix[] 
ciphertexts) {
+               return new CiphertextMatrix(ciphertexts[0].getDims(), 
ciphertexts[0].getDataCharacteristics(), 
NativeHEHelper.accumulateCiphertexts(ctx, extractRawData(ciphertexts)));
+       }
 
-    /**
-     * averages the partial decryptions
-     * @param encrypted_sum is the result of accumulateCiphertexts()
-     * @param partial_plaintexts is the result of SEALServer::partiallyDecrypt 
of each ciphertext fed into accumulateCiphertexts
-     * @return the unencrypted, element-wise average of the original matrices
-     */
-    public MatrixObject average(CiphertextMatrix encrypted_sum, 
PlaintextMatrix[] partial_plaintexts) {
-        double[] raw_result = NativeHEHelper.average(ctx, 
encrypted_sum.getData(), extractRawData(partial_plaintexts));
-        int[] dims = encrypted_sum.getDims();
-        int result_len = Arrays.stream(dims).reduce(1, (x,y) -> x*y);
-        DataCharacteristics dc = encrypted_sum.getDataCharacteristics();
+       /**
+        * averages the partial decryptions
+        * @param encrypted_sum is the result of accumulateCiphertexts()
+        * @param partial_plaintexts is the result of 
SEALServer::partiallyDecrypt of each ciphertext fed into accumulateCiphertexts
+        * @return the unencrypted, element-wise average of the original 
matrices
+        */
+       public MatrixObject average(CiphertextMatrix encrypted_sum, 
PlaintextMatrix[] partial_plaintexts) {
+               double[] raw_result = NativeHEHelper.average(ctx, 
encrypted_sum.getData(), extractRawData(partial_plaintexts));
+               int[] dims = encrypted_sum.getDims();
+               int result_len = Arrays.stream(dims).reduce(1, (x,y) -> x*y);
+               DataCharacteristics dc = encrypted_sum.getDataCharacteristics();
 
-        DenseBlock new_dense_block = 
DenseBlockFactory.createDenseBlock(Arrays.copyOf(raw_result, result_len), dims);
-        MatrixBlock new_matrix_block = new MatrixBlock((int)dc.getRows(), 
(int)dc.getCols(), new_dense_block);
-        MatrixObject new_mo = new MatrixObject(Types.ValueType.FP64, 
OptimizerUtils.getUniqueTempFileName(), new MetaDataFormat(dc, 
Types.FileFormat.BINARY));
-        new_mo.acquireModify(new_matrix_block);
-        new_mo.release();
-        return new_mo;
-    }
+               DenseBlock new_dense_block = 
DenseBlockFactory.createDenseBlock(Arrays.copyOf(raw_result, result_len), dims);
+               MatrixBlock new_matrix_block = new 
MatrixBlock((int)dc.getRows(), (int)dc.getCols(), new_dense_block);
+               MatrixObject new_mo = new MatrixObject(Types.ValueType.FP64, 
OptimizerUtils.getUniqueTempFileName(), new MetaDataFormat(dc, 
Types.FileFormat.BINARY));
+               new_mo.acquireModify(new_matrix_block);
+               new_mo.release();
+               return new_mo;
+       }
 
-    private static byte[][] extractRawData(Encrypted[] data) {
-        byte[][] raw_data = new byte[data.length][];
-        for (int i = 0; i < data.length; i++) {
-            raw_data[i] = data[i].getData();
-        }
-        return raw_data;
-    }
+       private static byte[][] extractRawData(Encrypted[] data) {
+               byte[][] raw_data = new byte[data.length][];
+               for (int i = 0; i < data.length; i++) {
+                       raw_data[i] = data[i].getData();
+               }
+               return raw_data;
+       }
 
-    // TODO: extract an interface for this and use it here
-    private static byte[][] extractRawData(PublicKey[] data) {
-        byte[][] raw_data = new byte[data.length][];
-        for (int i = 0; i < data.length; i++) {
-            raw_data[i] = data[i].getData();
-        }
-        return raw_data;
-    }
-}
\ No newline at end of file
+       // TODO: extract an interface for this and use it here
+       private static byte[][] extractRawData(PublicKey[] data) {
+               byte[][] raw_data = new byte[data.length][];
+               for (int i = 0; i < data.length; i++) {
+                       raw_data[i] = data[i].getData();
+               }
+               return raw_data;
+       }
+}
diff --git 
a/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupMorphingPerformanceCompare.java
 
b/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupMorphingPerformanceCompare.java
index ca15628c64..14962b038a 100644
--- 
a/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupMorphingPerformanceCompare.java
+++ 
b/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupMorphingPerformanceCompare.java
@@ -150,7 +150,7 @@ public class ColGroupMorphingPerformanceCompare {
        }
 
        protected static class SDCNoMorph extends ColGroupSDC {
-
+               private static final long serialVersionUID = 
-7157464508602251065L;
                private final MatrixBlock mbDict;
 
                protected SDCNoMorph(int numRows) {
diff --git 
a/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupNegativeTests.java
 
b/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupNegativeTests.java
index fb94a9a8c8..485584e4fa 100644
--- 
a/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupNegativeTests.java
+++ 
b/src/test/java/org/apache/sysds/test/component/compress/colgroup/ColGroupNegativeTests.java
@@ -138,6 +138,8 @@ public class ColGroupNegativeTests {
        }
 
        private class FakeIndexing extends IndexFunction {
+               private static final long serialVersionUID = 
-4099420257856761251L;
+
                protected FakeIndexing() {
                }
 
@@ -173,12 +175,16 @@ public class ColGroupNegativeTests {
        }
 
        private class FakeValueFunction extends ValueFunction {
+               private static final long serialVersionUID = 
-585186573175954738L;
+
                private FakeValueFunction() {
 
                }
        }
 
        private class FakeAPreAgg extends APreAgg {
+               private static final long serialVersionUID = 
8759470530917794282L;
+
                private FakeAPreAgg() {
                        super(new int[1], Dictionary.createNoCheck(new 
double[13]), null);
                }
@@ -339,6 +345,7 @@ public class ColGroupNegativeTests {
        }
 
        private class FakeDictBasedColGroup extends ADictBasedColGroup {
+               private static final long serialVersionUID = 
7578204757649117273L;
 
                private FakeDictBasedColGroup() {
                        super(null, null);

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